Articles tagged #RHS PRO-ACTION HEADS
Articles tagged
#RHS PRO-ACTION HEADS
Junkyard 350 to 420 Horsepower: A Wrecking-Yard Small Block Gets a Head and Cam Upgrade
We pulled a running small block from a wrecking yard for under $300, baselined it at 312 hp on the dyno, and then upgraded the heads and cam to reach 420 hp and 415 lb-ft of torque - all on the original short block.