white95gt

I'm building a 1/4 mile 10 sec street car I was told to build a 347 but why not just build a 351w with the heads cam intake and what not. Wouldn't the 351 make more power?

TRexGAWD

Benefits of a 347 is it's easy and cheap since you already have the 302 block. Nothing really changes except for the internals and it bolts right in.. If you have the extra money though go with a solid 351 that's been freshened up, and if you really wanna have fun do a 408 stroker.. Of course, it just depends on what you want to spend. The reason someone recommended the 347 is because it's an easy 10 sec car.. If you're wanting something serious than go bigger.

white95gt

Well I can get a 351 for 200 complete oil pan to intake. Then I'd have to have it cleaned. And everythang new oil pan transmission the 347 might actually turn out cheaper

thegstring

im going 351 block, you can make more power safely. popular belief is that a 302 block can only handle 500 horses max, a 351 block can handle 500 very comfortably.

white95gt

thats why i am leaning more toward the 351w build cause once the car is in the 10s i might decide to spray it one day and i wanna feel comfortable knowin when i leave the line sprayin a 100-150 shot it will more then likely hold

Venomantidote95

That all depends on assembly, machine work, tune etc, a 351w is no better unless it is done right either! cubic in for cubic in 351w with a similar setup will more times than not be out performed by the 347!

I know where plenty of stock block 347s are that make more than the block limit and are still holding strong! It is all in a sound starting block and getting everything right after that...

Will it hold forever? no, will a 351w last forever? no!

Its in budget and what you plan to do in the long run.... If you are gonna stay around 150 shot of nitrous then its fine on a 347 with a quality balance job with a quality assembly with a good tune!

I spray a little more on mine but i`m just curious lol! I also have a progressor!

thunderjet429

All you need to do is compare the bottom end of the two, the main area of a 351W is much heavier than a 302. Plus you dont have the oil ring right against the wrist pin with a 351W. The only advantage... if you can call it that is a 347 will be lighter.

white95gt

the car is gonna be a daily driver i wanna keep it a 5 speed but unless i can afford a tremec ill go built c4. I will go with trickflow 205cc or 225cc twisted wedge heads, 1.6 roller rockers, custom grind nitrous cam, edelbrock efi intake.

thunderjet429

I have had both, stick is alot more fun to street drive and the C4 will be more consistant at the track... to buy a C4 that will hold that much power reliably you are looking at around $1,200. That is a good bit cheaper than a TKO 500 or 600 for sure.

white95gt

i want a reliable street car that makes 10 second passes. I know ill have to fork up some money for it to be reliable and i am ok with that ive lost my license for a year so it gives me time to build it. if i went with a automatic id put a reverse manual valve body in it.