Stock 1979 360 with Speedmaster head question

dartfreak75 said
Isnt the 1008 thinner than the 1121?

The Fel Pro 1008 is a 4.180 bore .039 compressed thickness
The Mr Gasket 1121G is 4.140 bore with a .028 compressed thickness
.011 isn't much but it all adds up at the end.