Do stock 318 pistons have valve reliefs in them?

[LXguy]

Hey

Do stock 318 pistons have reliefs for the valves or are they straight flat tops?

Thanks

Steve

 

[doug 371]

early 318's have valve reliefs (4) and later than 72 maybe earlier are flat tops...i had a 69 with advertised 9.2 comp. with the 4 relief pistons

 

[sublimeswinger]

yup, they got them. Atleast stock 68's do.