check the side pass side of the block for date casting,driver side for cubic inch casting.

this will ID what yr 360 headed 318 you have.

if it is a 85 up 318 block it will be the roller block with a flat tappet cam.

FYI..you then can use all of the stock roller cam hardware/valve gear and swap in a roller cam with out removing the heads from engine.

and by using the later model roller lifters that oil thru hollow PR, you are 1 step from swaping on a set of magnum heads.

nice up grades for the future projects.

the 360 headed 318s are a nice combo,650 carb/air-gap intake/roller cam/headers

here is my 88 360 headed 318 4-v in my 85 truck.