Well i had the intake and exhaust milled together and it looks good, , but i also found out that the gasket that goes from intake to carb has cracks, , i tried to find one but the one i have is about 5/8 thick and the parts house want to sell me a normal one 1/8 thick, ,, whats up with that? ?

Thanks

1958 chevy biscayne
235 6 cyl 1 barrel
2 speed PG tranny