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Author Topic:   Motorcraft Carb
Dirt Full Roller

Total posts: 68
posted April 06, 2005 07:27 PM  
I am going to switch from a 2bbl. Rochester to a 2bbl. 121 Motorcraft. Will I be able to run the same size of jets in the Motorcraft as the Rochester ? And will Holley jets fit the Motorcraft ? I have 76 jets in the Rochester know on a 355 9:1 Chevy. Thanks.

Dirt Forum Champ
Total posts: 1019
posted April 07, 2005 06:55 AM  
No, you will not be able to just use Holley jets without installing jet adapters or some other fancy machining. M'craft jets have larger threads, usually.
The 121 carb needs lots of modifications in order to even come close to what your 2G probably does for you now.

Good luck,


Dirt Full Roller

Total posts: 36
posted April 10, 2005 10:40 AM  
Yeah stick with the rochester!

for all you do, this mud's for you

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