Hot Rods Chevy small block 3x2 intake

Is there a small block tripower intake that uses the large base Rochester carbs?

 

None I ever saw or had. I do believe there weren't some type of adapter for the ones that took 3 bolt style.

 

Offenhauser made them, I sold a NOS one a few years ago. It may still be cataloged but I don’t know.

 

Fordors is correct. Offenhauser makes them - or at least they did when I bought a new one 2 or 3 years ago. I set mine up with factory Pontiac early tri-power carbs, which use a small base carb for the primary (center) carb and large base carbs for the secondaries. I was able to locate a seller on eBay that machined large to small base adapters as well as large base risers all the same height so I could install all three carbs on the Offy large base manifold.

 

Great, where did you buy yours b.sutton? I looked on speedway and summit racing and just saw a small base available.

 

Is the large base Rochester the same bolt pattern as Holley 2300?

 

Sorry for the delayed response. I bought mine from a local guy that is an Offy dealer/vendor. You might try these guys: https://www.exeterautosupply.com/
I’ve attached a picture of mine with the risers/adapters. Additionally, I believe I used a thermostat housing for a tri-5 Chevy. That front carb is a close fit, even with the riser.

 

I will give him a try and see if they have anymore. Thanks for the help. If anyone reading this has a good used one I would be a buyer for it. Thanks

 

Offenhauser 5254