I just picked up a bunch of 360 stuff. Included was a set of 4343474 casting heads. A quick search sow them as 85-89 318 4bbl/360 heads. Are these the same castings as the 308s ?
If you have the heads...then just look in the int port for the linked over guide boss and stick your finger into the exhaust port and see if its floor is raised/shaped like a mag/308.
The port floor is unmistakable.
I'd say if they were roller heads...the pushrod holes would be a 1/2 inch unlike the Older LA's 3/8 'roughly measured'.
318 heads have a small int guide boss compared to all factory LA 360/340 heads.
