Standard adapters, 660s will need a little more spacer height for the mechanical throttle linkage they use, I have a pair I tired before I put these 715s on. As their linkage spins that big arm will hit. Regular vacuum secondary and probably DPs usual linkage will clear. The ones I put on I had trimmed the bottom tab off back in 1971 to clear my 409 manifold with them sideways. Recolored and freshened a couple of years ago by Sean at SMI.
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Skip Fix
1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever!
1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand
1965 GTO 4 barrel 3 speed project
2004 GTO Pulse Red stock motor computer tune 13.43@103.4
1964 Impala SS 409/470ci 600 HP stroker project
1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs
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