axel breaker earl
+1y
Something no one has mentioned here........the rear end and transmission.
If I were to do a V8 swap in one of these trucks, the stock trans ain't gonna bolt up, so I would use a overdrive auto trans and go with a different rear altogether, with high 2's on the ratio........you'll get some decent mileage while having the torque to turn those gears plenty easily! It'll be quicker than stock trim for sure and it may even get better than stock mpg's!