GM aluminum 842 heads open chamber?
Has anyone seen a set of 842 big block aluminum heads that were open chamber design? I have to believe these have been modified? Alan Colvin's book says the 1968 and early 69's has a screw in plug on both ends and late '69 had a plug on only one end. These don't have a screw in plug on either end. The date looks like 7 15 69.
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70 Chevelle Vert L34 M21 28-A 791
70 Chevelle Cpe LS6 M40 14-14 756
70 Chevelle Cpe L?? M?? 926-99616 755
69 Chevelle Cpe L78 M21 71-B 756
70 Chevelle Cpe L34 M20 48-48 796
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