engine rebuild

I am in his same predicament. I went with a 331, over the 347 or 306. I started just wanting a fresh 302-found out it needed to be bored.
wanted to definitely get better hardware, since its the weak point of the smf.
arp rod bolts = $70 , recondition the rods = 230
then I still had to drop more $$ for polish (50.) or cut crank(175.) , bearings (main/rod/cam) and rings.
press off and press on new pistons (50.)
hot tank, balance assembly, align hone and square the block. and rebuild short block
I am into the machine shop for 1200 for labor.

NEW scat/eagle rods w.3/8 arp bolts = 190.
New .30 flat tops I couldn't find a set for under 400.
crank 50 or 175. plus bearings and rings equals roughly 800/900 bucks
I bought the 331 kit for 1050.
no brainer here 25 extra cubes for 100. bucks - priceless!

1bad67sbf said:

no, i dont have a lot of money to build my dream motor yet like some of us do, so i do what i can with what i got. mine for my 67 should be 375ish flywheel hp with a stock .40 over bottom and a 600cfm carb, an old school f4b intake, comp hydro tappet .512 lift cam and edelbrock 1.90 1.60 e street heads and some supporting mods. seems like most people get a fair cam and some gt40 heads and an intake and say its bad ass but most often puts alot less power down than the thought they had.

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From what I've seen It's hard to break 375 ish n/a with a 600 carb and 10:1 c/r out of a 302. You can do more with more compression, a lot more, but it's bye bye pump gas. That's why, like I said earlier I started leaning toward more cubes 20 years ago. On spike tv a year or so back, on their horsepower tv program they did an edelbrock combo on a 347 with edelbrock heads, cam, intake and carb all matched and it dynoed something like 480 hp and 500lbs torque with 10:1 cr on 93 octane gas. In my honest and humble opinion, that's better than boost, but everybody's entitled to their own opinion!

SSeater said:

From what I've seen It's hard to break 375 ish n/a with a 600 carb and 10:1 c/r out of a 302.

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That's probably because the carb is on the small side, and probably also assuming a weak two plane manifold and small heads.

Not that you should put a lot of faith in magazine articles, but I've got a recent MM&FF issue where they made 412hp from a 306 with 10:1 CR, Twisted Wedge 185 CNC heads, an OTS Comp cam and some junk ProComp dual plane manifold. I forget what size the carb was, but it was bigger than 600. Same engine with a GOOD single plane manifold and a custom cam with more lift (the cam they used only had something like .550-.560 I and E, but the heads come assembled with springs that will handle .600), and I'm sure they could have easily seen 430 or better, and this would have been a very streetable engine, too.

NikwoaC said:

That's probably because the carb is on the small side, and probably also assuming a weak two plane manifold and small heads.

Not that you should put a lot of faith in magazine articles, but I've got a recent MM&FF issue where they made 412hp from a 306 with 10:1 CR, Twisted Wedge 185 CNC heads, an OTS Comp cam and some junk ProComp dual plane manifold. I forget what size the carb was, but it was bigger than 600. Same engine with a GOOD single plane manifold and a custom cam with more lift (the cam they used only had something like .550-.560 I and E, but the heads come assembled with springs that will handle .600), and I'm sure they could have easily seen 430 or better, and this would have been a very streetable engine, too.

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sure. twisted wdge heads are waaay better than the edelbrocks, and 412 is totally believable. I have a friend doing that with afr's. I agree with you. my point is you won't see 500ish hp with a 306 and you can easily with a 347 or stroked 351. It's silly to me to spend 3k to 5k for a power adder to make 400hp when you can put that money into the ENGINE and do the same, then later spray it or boost it a little if you need more. oh, and 600 holleys are for people who aren't serious about going fast!

check this guy out- 408w with 150 shot runnin 9's



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