What are you using for motor mounts?
I ran into this problem on my 73 pickup when I was using ECE's motor mounts on my 6.0L/4L80E documented here:
http://67-72chevytrucks.com/vboard/s...d.php?t=193657
This is with ECE mounts on my '73 frame:
I am selling those now...
This past weekend I replaced the ECE mounts (which posistions the SBC about 3" forward of a normal SBC) and put S&P motor plates on it (which mounts it back in the same position that a SBC would mount. I expected grinding on the port above to clearance it and was told 00-02 F-body manifolds would work, but I believe I have it to where I can use the factory Truck manifolds.
I
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Chris Lucas
1973 Chevy C-10
1978 GMC Jimmy (2WD) - SOLD
1987 R10 twin turbo LS
1991 R3500 SRW CrewCab
1985 K5 diesel swapped project
1989 K5 2WD conversion w/ Vette susp Project
Captkaos Customs
73-87chevytrucks.com