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I have a CIS 2.7 (911/85, 1977 2.7 7R, ie lower compression 8.5, cams, etc) with Weber 40s and SSI in my 71. Its pretty good!
I have a 911/85 7R core I bought that I'm building into a hot 2.8 motor. The case is off for machine work now, the core was very clean. At a high level, will be 10.5:1, high compression, dual plug, full EFI/Coil on plug, Motec, PMO or Kinsler induction, custom heads, pistons, rods, cylinders, cams, rockers, etc etc.
It should be fun in my little signal orange T
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