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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The only difference in these motors is the cam and the L31-R is half the price. The L31-R is a 3/4 ton motor and has the torque to move your truck. If you really have to have the extra HP just do a cam swap but I think you will be surprised at the power of the L31-R with a 4 barrel carb and good exhaust.