Join Date: Jul 2012
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Personally I would go with the big block, I have had both and found that a small block is a good car motor but for a truck the big block has more usable power and torque and believe it or not but in the same vehicle the big block will usually get better MPG. Not to mention engine life, a big block has torque at low rpm, the small block is a high winding motor, high rpms means shorter engine life. I have a 1985 Suburban that had a 350, it got 10mpg and was seriously under powered, I replaced it with a 454, got the same, 10mpg, but the power difference was amazing. Matter of fact, within a month the big block blew out the 700R4 tranny, to much power and torque for the 700R4. I am now looking at having the 700R4 rebuilt and beefed up or just going with a turbo 400, which is alot stronger tranny.
Last edited by ferjr; 10-29-2012 at 02:30 PM.