These are 6061 aluminum, 3.8" thick and fit perfectly on an M7 or M8 head, fits just fine on all others. I deliberately did not cut any excess material which serves three purposes:
1) The excessively large water jacket on the back port on the aussie (magna) head is completely covered.
2) The useless to us fuel pump port is completely covered. NO MORE LEAKS!
3) The distributor hole is covered. If you have enough moxie to roll your own intake you likely don't intend to use a distributor, but if you do you can just cut that end off beyond the water jacket. If you want to run a Mighty Max optical distributor (for crank and cam signals) you can drill an appropriate hole and you *shouldn't* need a spacer. I say shouldn't because I have not tested it. I run a Mighty Max dizzy on my MPI car and its using a 1/4" spacer, I don't believe another 0.125" is going to throw it out of the range of adjustment it already has.
Obviously you'll need to fab your own gasket using a roll of gasket material, any auto parts store carries it.
So what do I mean by "fits just fine on all others"? Well, there are slight variances in the actual intake ports for each runner on the many heads designed for the G54b, both in overall diameter and port placement. I'm being real picky and giving complete disclosure, we've put this intake plate on the M7, AMC Marnal, factory JV and D50 heads and while it is perfect on the M7/8 because that is what it was designed on you can feel some slight differences on the other heads with your finger between the plate and the bore. Again, if you have the moxie to fab an intake then you can certainly compensate, its just a few thousands of an inch.
AMC MARNAL HEAD
AMC MARNAL LEFT SIDE
AMC MARNAL RIGHT SIDE
So, anyone want one? Again, these are a finished product suitable for your next extravagant G54b build, like mine! I'm going 48 MM ITB. If demand is high we can make more.
Edited by scott87star, 22 August 2014 - 09:27 PM.