Poly 318 vs LA 318 Rocker Shafts?????

Jadaharabi said
Poly head=semi hemi not a wedge head.

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Is that a 318 poly or an older 313. My 1967 had hydraulic lifters and non adjustable rockers. My 66 had solid lifters and adjustable rockers. I also thought the valves were inline. But I could be mistaken as the last 1 I did was in the mid 70s. Kim