stupid question but i dont know the answers so...whats wrong with 7500 with 272? please enlighten me because i have comp 280's and i bring them into low 8s sometimes

 

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It's called valve float... Kelfords have 11.0mm of lift. Only one of your Comp cams has 11.0mm of lift. Also springs are recommended for your cams.

Bring them to 8K a couple of times, then do a cylinder leakdown test.

 

from ur power level id say ur still stock block, and if it was build that is deff somthing to mention bec u could get more money in selling the car or somthing the buyer should know..

350 @ 21psi seems stock block IMO

 

n if u have kelford 272's revving to 8k or under ur fine, ive been doing it for 2 years just about now.. just get headstuds n ur fine

 

maybe you can find a shop who can remove spark plugs and look inside with a borescope to check your pistons

 

^ not too sure if that would help too much due to carbon build up on the tops of the pistons, maybe if they were super fresh it would help...

 

well i bought the car with 69,500 miles and its just over 72,000. The motor was still being broken in when I bought it so it is pretty fresh

 

+1 take it to a shop