My humble experience is that none of the rollers fit under stock valve covers. You'll need to get new covers in addition to the rollers. As for instalation, not too bad. You'll need a big breaker bar with a socket to slowly rotate the engine to get each valve fully closed as you bolt it down otherwise you'll not be able to properly set the torque and the valve will hang slightly open.
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91 GT Carb conversion, holley 600 double pumper, edelbrock performer intake, FMS "C" drop springs, march 1000 underdrive pullies, crane 1.7 roller rockers, GT-40P headers, bassani x pipe, american thunder catback, FMS 4.56's, msd aL6, trunkmount battery, A/C eliminator kit, 3000 stall tci streetfighter, AOD with transgo kit, A+ servo, 300M hardened lockup shaft, kevlar bands and 28,000 gvw trans cooler, 3 core radiator, 300 lbs stripped with a full interior
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