Re: Machine intake manifolds

[Guynn <amx69@xxxxxxxxxx>]

It would be nice if AMC had only used the ''Machine'' intake manifold 
opn only the 1970 Rebel Machine but that is not the case. Very many 1970 
Ambos with 390 engines had them as well. And I have seen more than one 
Machine intake on 401 engines installed in J10/20 Jeep trucks. I believe 
that AMC had extra engine packages in inventory and used those in the 
bigger, heavier vehoicles when a ''regular'' optioned engine was not in 
inventory but the work order called for the big engine.

The Rebel Machine did not carry a hood scoop[ to help clear a taller 
intake manifold. They carried the hood scoop simply because everyone in 
the specialty car market was using hood scoops at the time.I don't 
believe the cast iron intake on the Machine is taller than a plain cast 
iron AMC 4 barrel. If it is taller it is not by much. The internal 
design of the runners is where the power boost comes from. I might add 
that the Machine intake is nearly a carbon copy of the Traco Trans Am 
intake used in 1970 and 3 races in 1971. Put a Machine intake next to 
the Traco and every single hole, and casting is identical, even right 
down to the cylinder numbering being cast it. Every hole, every nook and 
cranny, all exactly as on the Machine intake. The ONLY variance is in 
the Casting number area. The Traco uses an R&D number rather than a 
stock cast iron AMC casting number.The 3 I have owned all had RD # 68899.

Hope this info helps someone out there.

Regards,

Randy Guynn