Joe,
Thanks for the response, I had really started to think this forum had died or something. Fast does have a bracket made by Comp to adapt their 92mm big mouth throttle body to a 5.7 hemi. In further research, I have noticed the 3 bolt style original LS1 throttle bodies have an IAC hole above the throttle port that meets up with a hole in the original LS1 manifold. Outside of somehow modifying the throttle body or the adapter plate to port that air back into the original throttle hole it would be impossible to run on the hemi. This leads back to just running the fast 92mm adapter and an aftermarket 92mm 4 bolt throttle body modified with my own bracketry for the throttle valve cable.
Cost is a bit of a wash between the two. I'd have to buy the throttle valve cable kit from Lokar regardless which is around $80, making the rest of the BTO kit worth $90 (to them). A stock throttle body with the IAC and TPS sensors is around $100 on ebay and I'd have to fab my own adapter plate. A total of around $270.
Whereas the fast adapter plate is $65, an ebay 92mm 4 bolt throttle body is around $100 with the TPS and IAC, and the lokar cable is $80 plus fabbing the bracketry. A total of around $245.
The majority of the aftermarket throttle bodies however use what appears to be an aluminum throttle cam, which would greatly complicate the bracketry fabrication and welding. It would however give me a bigger, better flowing throttle body with which the eventual cam and eagle intake possibly would make use of. Lots of ideas, I just want to be sure I don't spend thousands of dollars to have a transmission built and a cable is its downfall.
Ryan
I'm not sure I understand the first part, my TB adapter from fast has the bolt patterns for both the 3 and 4 bolt throttle bodies and is made to run the GM sensors (IAC/TPS) with the Mopar manifold. That's how mine runs, all Mopar connectors and sensors except the TB has the GM stuff... I totally get the headache of steel vs alum throttle cam... I was just saying if there is a larger option than 80mm in a factory LS TB I would use that...
This is my current bracket with my 727 kickdown running to the lower half in a permanent hole...
