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what are the exact cam specs? adv. dur, .050 dur, and lift?

unless it's quite large, you're wasting your money on roller or adjustible rockers.

specs are as follows:
Intake / Exhaust
Valve Lift 0.503 / 0.503
Adv. Duration 270 / 284
Timing
Int open 5.0 BTDC close 41 ABDC
Exh open 55.0 close 3.0 ATDC

Springs are Ede's, quite stiff, will be changed to springs which are from the Cam Manufacturer these days.

Ok, I think I want to change the rockers because I think it is time to do so. They are very old now and I want something reliable which is not so loose / wobbly from its design.