347 build on a D4DE block - Thoughts and Advice

bnero42 · Jan 15, 2020

All,

I know this has been beaten to death on the inter-webs and I have consumed mass quantities of said subject on said webs and have decided that I am going to build a 347 out of my old 302.

I wanted to start this thread for advice and things to watch out for while I am setting up to check the "Build a stroker motor by hand" check box.

I pulled the block out of a non numbers 6cyl converted to 8 cyl - '65 fastback I picked up a few years ago and am now rebuilding - was told it was a 67 -289 and was gonna sell it - but now with a 302 block - the 347 is in reach and what I plan to build. I am not looking to set records but I am looking to get well into the 400Hp mark.

At this point the plan...

Eval engine block (magna flux) (other tests?)
Bore block (machine shop identified - reliable verifiable work)
AD Performance 347 kit
There is a current aftermarket cam that I need to identify once I get it out of the block or source new CC262 or like?
Cylinder Heads - Currently have iron heads from tear down - Looking for new aluminum heads - Gt40 vs X heads vs Trick Flow etc....?

Again - Purpose of this engine is going to be hard street use maybe a couple of drag runs a year. Going into a frame up Resto mod....

I have pics to post later - but wanted to put this up here so I can get thoughts from my fellow gear-heads and broaden my research to include direct input from motivated peers.

Cheers!
Ben

PS- That is a 70's Shelby lower intake manifold under the Holley 650.... Gotta look into that too SFJD-9425F...

LILCBRA · Jan 16, 2020

I think you'd get more exposure and probably more responses if you were in a different area of the site, maybe one of the mods can move this to somewhere more appropriate? @74stang2togo @Noobz347 @General karthief

But, FWIW, I think you have a pretty solid plan. Get that cam ID'd first so you know what you have then I'm sure people can make some suggestions. As for aluminum heads..... I was going to check on this ad I come across the other day, but I think if I'm being realistic I should skip it as I have too many irons in the fire. These should do you well as long as you can work around the exhaust ports being raised.

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Adieu · Jan 16, 2020

Moved from II forum to 5.0 talk for more exposure.

bnero42 · Jan 16, 2020

74stang2togo said:
Moved from II forum to 5.0 talk for more exposure.

Many thanks!

bnero42 · Jan 16, 2020

LILCBRA said:
I think you'd get more exposure and probably more responses if you were in a different area of the site, maybe one of the mods can move this to somewhere more appropriate? @74stang2togo @Noobz347 @General karthief

But, FWIW, I think you have a pretty solid plan. Get that cam ID'd first so you know what you have then I'm sure people can make some suggestions. As for aluminum heads..... I was going to check on this ad I come across the other day, but I think if I'm being realistic I should skip it as I have too many irons in the fire. These should do you well as long as you can work around the exhaust ports being raised.

Race Cars, Parts, Trailers & Engines for Sale | RacingJunk Classifieds

Race Cars, Parts, Trailers & Engines for Sale | RacingJunk Classifieds

www.racingjunk.com

Thank much you for the input and thoughts . I will check those out! Right now having the distinct pleasure of trying to remove lifters that seriously do not want to slide out. As soon as I can get the damn cam out - off to the shop for ID

CarMichael Angelo · Jan 16, 2020

LILCBRA said:
I think you'd get more exposure and probably more responses if you were in a different area of the site, maybe one of the mods can move this to somewhere more appropriate? @74stang2togo @Noobz347 @General karthief

But, FWIW, I think you have a pretty solid plan. Get that cam ID'd first so you know what you have then I'm sure people can make some suggestions. As for aluminum heads..... I was going to check on this ad I come across the other day, but I think if I'm being realistic I should skip it as I have too many irons in the fire. These should do you well as long as you can work around the exhaust ports being raised.

Race Cars, Parts, Trailers & Engines for Sale | RacingJunk Classifieds

Race Cars, Parts, Trailers & Engines for Sale | RacingJunk Classifieds

www.racingjunk.com

I’m thinking moving it to the classic section. He stated he has a 65 FB. Those guys do build strokers out of 302’s down there as well. Especially considering that it’s a non-roller block.

rustaddict · Jan 20, 2020

I like the 347 and I think you are making a good move. Good heads will be a must. They might be a little more expensive than some, but in my opinion AFR heads are the best way to go. Edelbrock makes a good head too from a quality standpoint. I'd be hesitant to trust a used flat tappet cam. 1 due to unknown wear and 2 new ones are not that expensive and then you know what you've got. Pick out the heads and engine kit you want and then call a couple of your favorite cam companies ( or some reputable ones if you don't have a favorite ) and let them suggest a grind for you after you give them all your information. It ought to be an animal when you get it built.

bnero42 · Jan 20, 2020

rustaddict said:
I like the 347 and I think you are making a good move. Good heads will be a must. They might be a little more expensive than some, but in my opinion AFR heads are the best way to go. Edelbrock makes a good head too from a quality standpoint. I'd be hesitant to trust a used flat tappet cam. 1 due to unknown wear and 2 new ones are not that expensive and then you know what you've got. Pick out the heads and engine kit you want and then call a couple of your favorite cam companies ( or some reputable ones if you don't have a favorite ) and let them suggest a grind for you after you give them all your information. It ought to be an animal when you get it built.

Thank you!! I like the heads, kit consult cam people idea alot... Great idea to call them and talk about the grind.
I got the cam out - still trying to id it for s and giggles.
The cylinder heads have been a pain in the drain to id. D3UE-AA.

bnero42 · Jan 20, 2020

Using a small slide hammer to gently extricate the "stuck" cam shaft - haven't found any markings on it. yet but haven't cleaned it either.
Will use a new one for this build - per Rustaddict's thoughts.

I assumed the cylinder heads were not worth any work/salvage but D3UE-AA - cylinder head castings are not the easiest to find information on.
But I have googled and found they are decent - found this from a 2007 thread.
"The info I have on it is it was from a 1973 302, had 63cc chambers, 18mm gasketed spark plugs, and had no thermactor system. Might be a good set to work with."

It sounds like I will want to get new heads for this 347 build, but could clean/machine old ones for future build or maybe catch a few $$"s..

The Shelby intake is an SFJD-9425F casting 70's high flow lower - Maybe not for this build but a pretty cool little part to have.

rustaddict · Jan 21, 2020

You can't beat getting advice from the people who make a living out of building cams and have spent countless hours of R&D time finding out what works and what dosent. Best of all it's free. Several companies will deal with you by email. I know Comp and Crower will. Bullet Cams will also.

bnero42 · Apr 22, 2020

Finally brought the stripped iron heads to the machine shop. Clean, pressure test and confirm cfm. See if we can work these heads into something I can use on the 347 block .

Blue_Cheesehead · Apr 25, 2020

bnero42 said:
Finally brought the stripped iron heads to the machine shop. Clean, pressure test and confirm cfm. See if we can work these heads into something I can use on the 347 block .

Your stock heads will "work", but you will be choking off significant horsepower. I too am a fan of AFR. 185's would be a solid choice.

bnero42 · Jun 3, 2020

It's happening - block is at the Machine shop as are the following parts.
With the final bits incoming for the balancing....

bnero42 · Jun 3, 2020

Blue_Cheesehead said:
Your stock heads will "work", but you will be choking off significant horsepower. I too am a fan of AFR. 185's would be a solid choice.

I am going to go with some DART aluminum heads through the machine shop - I will have room to upgrade

CrisNavarro · Jul 19, 2020

Hi guy! Will be a good option to use 351 Head cylinders for a 347 stroker?

bnero42 · Jul 20, 2020

Hey Cris - I actually got talked into the AFR 185's - we got the 's working well.
I expect the lower back balanced and bored from the Machine shop this week!!!

CrisNavarro · Jul 20, 2020

bnero42 said:
Hey Cris - I actually got talked into the AFR 185's - we got the 's working well.
I expect the lower back balanced and bored from the Machine shop this week!!!

Thank you for your information, but I heard about the gt40 or gt40p. they are not to expensive...

bnero42 · Aug 1, 2020

Building the 347 and my lady fastback on a rotisserie....

CrisNavarro · Aug 1, 2020

bnero42 said:
Building the 347 and my lady fastback on a rotisserie....

Did you buy the 347 stroker kit?

bnero42 · Aug 1, 2020

CrisNavarro said:
Did you buy the 347 stroker kit?

Yes - Scat through summit.

347 build on a D4DE block - Thoughts and Advice

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