Strong block for a 347

JUCD 5.0 · Jan 29, 2008

I am FINALLY getting my butt in gear and switching focus from my Dodge Viper BACK to my 91' Mustang GT. I'm planning on totally re-doing almost everything . So first off I need a good motor. So I have decided to go with a 347 stroker motor. BUT my question is what block should I use, i'm trying to conserve money so it can;t be a super expensive block because I also have to pay to get it bored over to a 347. Any suggestions or ideas? Thanks in advance everyone!
JUCD

P.S. I plan on using my Victor Jr heads on the 347 and my X-cam. Is this a good idea? Any other suggestions for the motor, I am planning on buying a stud gurdel also.

5spd GT · Jan 29, 2008

If you get an aftermarket block, you will not need a stud girdle.

If you are just planning an N/A 347, just use the stock block.

A custom camshaft for a 347 is going to be much better than an off-the-shelf camshaft for a 302 in a 347

The Victor Jr. heads are good.

87foxstang · Jan 29, 2008

I was going to say dart lol until I saw you wanted to conserve money, good call

Like he said, if your going N/A use the stock block

JUCD 5.0 · Jan 29, 2008

Ahh sorry i'm an idiot I should have mentioned that I WILL be spraying nitrous at LEAST a 150 shot for sure, but I would like to be able to shoot more in the future maybe?

Thanks for the help so far guys.

Yes i've looked at the dart blocks and they are alot more expensive then I am willing to spend.

Any other ideas?

2000xp8 · Jan 29, 2008

Shop around for a used A4 or R302 block. Sometimes they pop up at a decent price.
A good 347, will only be 100hp or less, to the stock blocks limit.
Another 150 and you are certainly well into the danger zone.
I agree with getting a custom cam too.

85_SS_302_Coupe · Jan 29, 2008

You could probably get away with a Mexican block if the tune is spot on.

Ocalafox · Jan 29, 2008

If you have $75K in a viper you should at least get the new boss block for your stang. About $1600 for the block plus 3-400 for the machine work. Come on, go BOSS!

JUCD 5.0 · Jan 29, 2008

Ok sounds like the custom cam is a great idea. What brand should I go with and how much am I looking at spending?

Nah lol I know I have a ton of money into my Viper and thats why I can't spend as much money on the Stang, I'm probably dumping 8K into the Stang in the next 6-8 months and I have a lot to do.

I'm going to check out those blocks and see what I can find..

Thanks for the help so far guys, any other suggestions are appreciated.

Jasperstang308 · Jan 30, 2008

if you find a mexican block it should be fine.

custom cam for jay camshaftinnovations.com

the x cam i wouldnt even consider.

the victor jrs are a nice head. what intake are you using? trickflow R intake? what headers i HOPE a longtube.

talk to jay he will open your eyes. a properly built 347 can run 10's and make above 400rwhp

5spd GT · Jan 30, 2008

A 347 can run 10's, but you have to have suspension work to do that and a pretty hoped up set-up.

Through personal experience, go with Ed Curtis @ www.flowtechinduction.com.

Just shoot him a couple emails. He is a busy guy but let him know you are serious. Cost is $325 for better performance, better driveability, better vacuum.

JUCD 5.0 · Jan 30, 2008

Jasperstang308 said:
if you find a mexican block it should be fine.

custom cam for jay camshaftinnovations.com

the x cam i wouldnt even consider.

the victor jrs are a nice head. what intake are you using? trickflow R intake? what headers i HOPE a longtube.

talk to jay he will open your eyes. a properly built 347 can run 10's and make above 400rwhp

What is a MEXICAN BLOCK? I've never heard of this but i've been out of the Stang community for a few years. Where would I find a mexican block?

I am planning on buying longtube headers and getting rid of my shorty's. Not positive what brand to go with, any suggestion on which puts out the most HP/TQ?

I currently have the Trickflow STREET HEAT, but I will be selling it and switching to a different intake as well. I was considering the Trick flow R TRACK HEAT intake, or something else if I can find a better one. What would be the best intake on a 347 with nitrous?

Should I get my heads ported and polished?

I will give Jay a call and look at his website, thanks for the info.

I am definately wanting to run 10's.

As far as the transmission I would like the LINTECH AOD, so that I can still have a street beast. I'm actually all set up for drag racing right now, but I want to drive more on the street SO I will be redoing the whole suspension. ANY SUGGESTIONS on suspension or transmission?

Currently I have 4cyl struts and springs up front, Eibach drag springs in the rear with strauss 7 way adjustable stuts, no sway bars, and drag lites on it. I am probably switching to Chrome Cobra R's, but i'm open for suggestions on a different rim.

Thanks again everyone for all the help so far!

JUCD 5.0 · Jan 30, 2008

I'm also going to be switching a few things on the exterior, like a stalker fornt bumper, saleen rear wing, 4" cowl hood W/svo scoop, and a completely different paint job with stripes. But this is tech talk so I fugured i'd make a new thread in the talk section sometime today about what the exterior should be like.

JUCD 5.0 · Jan 30, 2008

Is the mexican block strong enough to handle everything i'm planning on doing? How can I know for sure the block some guy is selling is the mexican block? Any destinguishing markings or specific numbers? I'd be pissed if someone din;t know what they were talking about and it was a stock block lol.

Rick 91GT · Jan 30, 2008

A 3.40" stroke in a Boss block is not ideal, the cylinders are shorter then stock and with that stroke it pulls the rings way, way down...WHY they made it shorter I have no freaking clue.

Here's my opinion, Have a DART Sportsman based set-up build the first time so you are not wasting money on a stock block. One time with a bad tune and you could cause a block failure.

X-cam, toss in the trash.... Vic Jr's, some port work does those a lot of good along with some valve train upgrades, go custom cam, Victor 5.0 intake, 30-36# inj, etc...

The Mex blocks have "Hecho en Mexico" cast on the valley, it most likely will be a early 70's block.

5spd GT · Jan 30, 2008

Jucd50 - Rick (above) can build you the engine you are after

JUCD 5.0 · Jan 30, 2008

Rick 91GT said:
A 3.40" stroke in a Boss block is not ideal, the cylinders are shorter then stock and with that stroke it pulls the rings way, way down...WHY they made it shorter I have no freaking clue.

Here's my opinion, Have a DART Sportsman based set-up build the first time so you are not wasting money on a stock block. One time with a bad tune and you could cause a block failure.

X-cam, toss in the trash.... Vic Jr's, some port work does those a lot of good along with some valve train upgrades, go custom cam, Victor 5.0 intake, 30-36# inj, etc...

The Mex blocks have "Hecho en Mexico" cast on the valley, it most likely will be a early 70's block.

Yikes the Dart sportsman block is to expensive and out of my budget range, so I think I am going to go with a Mexican block if I find one. unless anyone else has any other ideas or suggestions. Is there any downfalls to the mexican block, how much power can one handle?

What kind of valve train upgrades do I need for my victor jr heads? How much $ are we talking about?

I'd rather build my own motor myself just to say i've done everything, i don;t particularly like other people building my stuff unless it's something like boring a motor and actual machine work like that.

PJC Racing · Jan 30, 2008

60's 289 or 302 block and use tie-bar lifters with a roller cam.

JUCD 5.0 · Jan 30, 2008

PJC Racing said:
60's 289 or 302 block and use tie-bar lifters with a roller cam.

Is this the mexican block your talking about?
Tie-bar lifters? Never heard of them but i'll look into it.

Man I have A LOT of work ahead of me!

5spd GT · Jan 30, 2008

You have a Viper and you are worried about spending $1,500 on a block that will be the last block you ever own?

As for a custom camshaft, that should be the last thing you purchase. This way, it matches all your cube and induction components.

I prefer Ed Curtis for a couple reasons over the "other guy(s)".

- Actually is a member on this site
- Does not trash talk this site like the "other guy (s)"
- I, as well as hundreds of others, have had great success.
- His attitude is better
- He has been doing it longer

85_SS_302_Coupe · Jan 30, 2008

5spd GT said:
You have a Viper and you are worried about spending $1,500 on a block that will be the last block you ever own?

Get yourself a World Products Man-O-War and stroke it to 370ci and call it day. Throw a turbo on it and 20psi and it'll waste your Viper.

Strong block for a 347

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