Thread: question about a 351 big block

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l just got into this cars stuff not to long ago and l have a mustang gt 89 l put in a 351 big block l also have a amd its not finish l took everything out so it can run more but l want it to know what u guys think about the car when is done and if l can do anything eles do get more speed l think its going to be fast because the body is not heavy but if any of u have any tips l would like to know and thank you

A 351 is not considered a big block. It is a Cleveland or a Windsor??? Being it is in a Mustang, I would imagine it is a Windsor. The Ford big blocks are the 385 series engines, such as 429's and 460's.....

Dave is right Alot of people think the 351 Cleveland is a big block...but it isnt, its a canted head small block.
The FE series is considered a big block to many.

Dont forget the 400-351 Modified Ford. It has small block heads and bigbolt bell housing pattern.

I have one with auzzy heads in my cobra. it was installed 12yrs ago and at the time it was the way to go in a 351.but today i think the windsor is a mutch beter way to go.good performance head are aveablefor them know.thay are mutch lighter and can be made to out perform a clevland for a lot less money.remember weight reduction=HP.