What About Edelbrock 340 Heads?

Oh! Remember the W2’s came out in 1974 and was used in NASCAR & Super Stock drag racing. The W5’s are a rectangle port copy of the W2’s.
Hard to find and a gamble on porting since the foundry did a crap job with crappier aluminum.

If you get a set that will port out to the max, Whoa! Watch out. 320cfm plus is possible.