This is my other or next size up from the 268H from my prev. question.
the XE274H duration 274in 286 exh ( I like this exhaust being bigger, THAT'S got to help my stock heads.)
.05 lift 230in 236exh
valve lift is 552 in 555 exh w/stock 1:7 rockers.
EXPLAINED BY COMP CAM AS HIGH PERFORMANCE STREET, STRONG MID-RANGE.
Let you in on little secret for the 454 BBC heads. Have a machine shop modify the heads to accept intake valves from ford 460. More gas and air to cylinder's equal more hp.
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