Quote:
Originally Posted by Chilly178
I have narrowed down to two engines, the L31-R or the newer SP350/357. I just don’t know how well the SP350/357 would work in a heavy 3/4 ton geared low. And I’m worried that the L31-R won’t have enough horses for me.
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One of the car magazines built an engine just like mine - L31, Quadrajet, rams horns, HEI, HT 383 cam - and ran it on a dyno for 330 HP and just shy of 400 ft-lbs torque - and their engine featured a bottom end that was used and not rebuilt. So if you compare it to the 290 HP motor you mentioned in your original post, you've got way more HP, tons more torque, and more importantly, the HP and torque are available across a much broader power band.