Quick Carb Adapter Question

http://www.summitracing.com/parts/TRD-2025/

is this the adapter i'd need to swap an early 80's cj7/258 one barrel to a 2bbl holley?

 

I know someone knows.
is a rochester 2bbl the same mounting size as a holley? large 2bbl?
is a carter carb a small 1bbl?

 

It's not a Holley pattern.

This is the Holley pattern: http://www.summitracing.com/search/...ange-application/Holley-2-barrel/?Ns=Rank|Asc

 

Which type of Holley 2bbl? There's not just one. For example, the 5210 used on the Chevy Vega: http://www.aaaaautomotive.com/Shop/Control/Product/fp/SFV/32785/vpid/6720969/vpcsid/0/rid/134382 apparently shares the pattern with the Rochester 2bbl. But the Holley 2300: http://www.summitracing.com/parts/HLY-0-7448/?rtype=10 is the pattern like Tim referred to above.

 

you are much better off switching to a 2bbl manifold if you want to run a 2bbl carb. i ran the 2 into 1 adapter and it ran ok . much better with the newer 81+ manifold

 

There's 2 different bolt patterns for Rochester 2bbl (2g/2gc) carbs. The smaller one is the same as a Carter BBD & was used on the Jeep 225 V6, Chevy 283 & others. The larger one was used on Buick/Olds/Pontiac v8's as well as larger Chevys like the 350. Neither of these is as large as the standard Holley 2bbl bolt pattern, which is the same as a Ford 2bbl.
Hope this helps!
Doug