w8less

what year block is it? there is a difference sounds like you need a aftermarket block

check out my thread it will show you what i mean

https://mustangforums.com/m_3617604/tm.htm

8A_Honda

I'm not sure what year. I'll take a look and see. Thanks for the link though. Still need info on the tranny's though in the meantime. Thanks.

WhiteWindsor

This is posted in the 351 section so that is the block i am speaking of. I have a 351 block, i would not give advise if i didnt. But if your looking for that kind of power you will def. need an after market block, I dont care how much cement or how many supports you use, any stock 351 from any year would not be wise to use if you are looking for 800-1000 hp. I am curious, do you actually have the parts for this kind of power or are we speaking hypothetically.

8A_Honda

I have the block, and was ready to get the internals for the block. Have the motor on the stand right now. Might be lookin for another block though I suppose. [:@]I know the 302 supports close to 500. If the 351w doesn't support that much more, I don't see the reason for people going thru all the trouble to upgrade to this block. I need to find some time to look and see which block I have for the 351w.

w8less

supposedly a 69 or 70 is good for 800hp but thats still pushing a STOCK block pretty hard. just get the block code and go from there

w8less

also, as far as the tranny is concerned i wouldn't do a 5 or spd the clutch would have to be very strong and probably wouldn't be that fun to drive. i would do a auto like a c4

WhiteWindsor

When asked "how much hp can a 351 block handle? The general concensus is around 700 hp, but it needs to machined and balanced perfectly. I would feel ok with about 600-650 hp but you were talking around 800 with conservative tune. I am not sure what the engines intended use would be but thing 600-650 hp will provide plenty of power unless your running in a 7 or 8 sec bracket competition.

8A_Honda

Thanks for the input. I'll start by looking at the block and see what it is that I have and then guess go from there. May get a smaller s/c if need be. Don't mind spending money on the s/c and internals etc. but $2k for a Dart or something is more than I care to spend on "just" the block. I wasn't aware of the problem with weak blocks when I bought the car. My last cars blockwas strong enough for that kind of power so didn't even give it a though when switching over to a Stang. Oh well. Appreciate the feedback though.Wanna build it once and get it right the 1st time.

WhiteWindsor

Damn i didn't think 700 horse on a stock block was weak. What kind of car and block was your last one that you are reffering to?

w8less

no kidding!!! you can run 9 or 10's with the proper suspension. how fast are you wanting to go?