My gen V was not a roller, (are you sure yours is?) and needed a adj rocker set-up for a performance cam. I went to 781 (049 are the same) heads, and roller rockers, and ditched the peanut port heads. I'd keep the cam, replace 1 lifter if needed, and save your money for the new top end, then upgrade the roller (i'll never use a flat tappet cam again). them rollers will last years, have a sbc roller cam with 130,000 mi on it BEFORE it went into the boat, 7 years ago (+/- 300 hrs since) and runs like a swiss watch
Make sure that you get a Gen V / mk IV compatible head gasket, ask me how I know.
factory roller Camshaft, lift (i/e): L29, Hydraulic roller, 0.480" / 0.483" hydraulic
Cam duration (i/e): L29, 204 / 209 degrees @ 0.050 lift
to maybe something like this...
GM Performance Hydraulic Roller Camshafts
Summit Racing Part Number NAL-12366543
Cam Style Hydraulic roller tappet
Intake Duration at 050 inch Lift 224
Exhaust Duration at 050 inch Lift 234
Duration at 050 inch Lift 224 int./234 exh.
Intake Valve Lift with Factory Rocker Arm Ratio 0.527 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio 0.544 in
Hope this helps
Daniel
Mash on it
