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Cylinders 3 & 4 read low during compression check

Can use a little help here, i have a 73 pantera 32000 original miles but had a rebuild on the engine about 10 thousand miles ago to boss 351 specs solid pop up pistons and quenches heads solid lifter cam with lots of over lap and 606 lift cam,my question is to my understanding boss 351 compression was 11.1 on my rebuild spec states the compression is 11.7 just out of curiosity i ran a compression check every cylinder read 240 except 3 and 4 read 200 i did it over several times to make sure,the car ran fine and compression check was done on a cold engine, would a to tight solid lifter adjustment cause this or something more serious.what concerns me is the 2 cylinder side by side possible head gasket. whatcha think?

Last edited by George P
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