[rwfisher]

Trying to determine a good flat tappet replacement on an RA III build. 48 heads with Comp cams extreme springs, roller tip 1.52 rockers. H Beam rods, dished pistons bringing the C.R. to ~9.6-1. 3.55 rear gears manual trans/Power brakes. Maybe a summit 2801?? Looking for a bit of lope!!!!!

[ponyakr]

How about a Summit 2802 ? Similar to a RA3 grind, with more lift, and cheap. My '69 RA3 GTO had the #48 heads and the "744" RA3 cam. Had a close ratio 4-speed and 3.90 gears. Ran mid 13's in factory original condition(+ 60,000 miles). Won lots of races at our local track. The car and some of the trophies are pictured in my avatar. I'm not braggin, just showing that the "744" cam in a 400 ran OK, back in the day.

Now, with all that said, if the car was mine, I'd run a RA4 grind(such as a Crower 60919 or Melling SPC-8), with Rhoads lifters. You got good rods and pistons. I'd let 'er thump, then turn it on, wind it up, and blow it out !