Bit of a Franken-engine here,

243's milled 0.020"
LM7 block with TSP stage 4 High Lift Cam (0.600"/0.600) and PAC 1219 springs
4.8L heads on LM7 rods and crank

Am I going to have clearance issues here running a stock head gasket or 0.045" thick gasket with the 3.910 bore size? I know i will need a pushrod checker but obviously want to avoid valve contact while getting a nice compression bump for NA and 93 oct only

Thank you for the help!

 

GM did the same basic engine minus the cam and called it an L33.

 

Probably not even close but a little play dough goes a long way.

 

awesome thought! Hadn’t even crossed my mind to do that, thank you guys

 

right I just am not sure with the heads missed and large cam if it would make a huge difference. Would love to find some l33 pistons but 4.8 I think is the same p/n if I’ve researched correctly