Thanks for your help guys.
Now I understand.
2 years ago i bought a Z303 cam. I installed it my first engine to 5.0 in 1994.
Then I checked the clearance, the piston-valve (0.050 ")
modifications, AFR 185cc heads (58cc), Edelbrock RPMII, 1.6 rockers, exhaust FlowMaster 2x 2.5 ", Mac shorty 1.5 / 8 headers .......
On the dyno result;
Horspower, 335 HP @ 5,791 rpm on the flywheel.
Torque, 459NM (340 lb-ft) @ 4205 rpm
max rpm 6778
the engine worked very well, just 5000 rpm up oil leak from dipstick tube.
Unfortunately, the pistons were cracked between the first and second ring, but the engine run until the end
I killed him with high rpm
Now I have a 5.0 engine 302 of 1988 lx (forged pistons), unfortunately, cutting the pistons are smaller than those of my previous engine.
Go back 2 *, or undercut the piston?
dynograph look looks good?