[Howard Jones]

These hyd roller lifter 302's will live longer, run better lap times, and in general work as designed if you shift them at something like 5600 -5800 revs. Even with a complete upgrade of the valve train, roller rockers, valve springs, pushrods, the works and a cam that will work for you above 6K, you will still be shifting atwell below 6500 in a hyd lifter motor.

With the exception of top gear and a long straight their just isn't a need to rev them much higher than 6K anyway.

Now on the other hand. If you are talking a solid roller cam engine, forged internals, with racegas compression ratios and first rate heads, then the skys the limmit $$$$$$$$$$$$$.

The main points of your rebuild should be, use ARP rod bolts, really get the clearances right, and have the engine rotating assembly and it's external parts, dampner, pulley, crank, clutch, as close as possible to a perfect ballance job as you can. After that, the first upgrade I would do is a set of quality valve springs and cam. You will still be at or below 6K revs but the idea is to get the power to continue building beyond 5400 or so where these FMS crate engines run out of steam and up to 5900ish. These are practical revs limmits (long useful reliable live) for the cast cranks, stock rods and production cast ports in FMS heads such as the XB303 that are used on a lot of the Ford crate motors.