You can use Either head. What psitons are you running? The 194 head will Boost the compression. with a flat top pistion it can be up around the
10-1 compression Give Or take a little. With the dished pistion it can be around the 9.5-1.
Hum interesting and the gasket. I have Never seen one for a chevy. If you can I'd like a picture of this gasket and maybe a Part number. But Something you could try??? if you wanted to is cut that Off.If you find you another gasket like that If cutting it Off doesn't Help.
The 194 head has a smaller combustion chamber That is why the compression will go up.This head can be made to flow some fairly good cfms But maybe Not like the 230-250 heads can.But if you want more of a low buck boost for some hp the added compression will help. If your running a flat top with the 4 valve relef like a 307 piston will net a little less compression Then a TRUE Flat top pistion.with the dished pision I see no reason why you couldn't still be able to run the cheaper 87 gas.As to the higher 91 that maybe needed if your running a flat top( closer to the 10-1 compression)
hope this helps }[oooooo]