I finally got around to making flanges from 58customs' drawings so I can report that they are dimensionally correct.

A few things to note:

-The exhaust runners are about 1.5mm larger than the ports on the head (1974 A13). I'm going to port match them so it's not a big deal for me but you may want to adjust.

-The oval worked out to be the same width as my heads (as expected) so I just centered a 32mm round over the oval port for my injector adapters. I'll port-match them later.

-I didn't notice that the intake bolt spacing is opposite between 1-2 and 3-4 until I actually went to fit them. The first set I made, I just assumed that they were identical so I just copy/pasted and ended up with 2 1-2 plates (since I only machined from one side).

Attach file:

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  EXHAUST RUNNER 1.jpg (167.29 KB)


  EXHAUST RUNNERS 2-3.jpg (131.47 KB)


  INTAKE RUNNER.jpg (130.83 KB)


  LR DIFFERENCE.jpg (87.76 KB)


  DOWN THE INTAKE.jpg (129.12 KB)


  STEEL INTAKE.jpg (138.30 KB)


  MACHINED OVERVIEW.jpg (147.06 KB)


  FULL COMPARTMENT.jpg (168.87 KB)