you know; we can always fall back on the NHRA factors. They give us a horsepower factor, and the blueprint to get there.
They give us;
67.... 273 2bbl@180hp with; 9.5Scr, 57.3cc heads, -.011 decks, and .028 gaskets
67.... 273 4bbl@235hp with; 11.5Scr, 57.3cc heads, +.129decks, and .028 gaskets
67/69 318s not spec'd with. ; 9.5Scr, 57.3cc heads, close to zero decks.................
78/80 318 4bbl@230hp with; 9.0Scr, 65.5cc heads,, -.041 decks, and .030 gaskets
71.... 340 4bbl@330hp with; 11.0Scr, 63.3cc heads, +.045decks, and .028 gaskets
72/73 340 4bbl@275hp with; 9.3Scr, 64.7cc heads,, -.054 decks, and .036 gaskets
74/76 360 4bbl@300hp with; 9.0Scr, 64.7cc heads,, -.067 decks, and .032 gaskets
78/80 360-4bbl@250/265 w/; 8.6Scr,68.4cc heads,, -.067 decks, and .030 gaskets
My Bulletin Book does not show the early Hi-compression 318s
