You might be able to get your vacuum in by using a thick base gasket like this one,instead of a phenolic spacer, that way you dont have to put longer studs in

https://www.carburetor-parts.com/Carter-YF-Rochester-B-BC-BV-Flange-Gasket_p_1410.html

Last edited by sstock; 08/24/2019 6:21 PM.

1953 Chevrolet 3100
261 cu inch, sm420, 3.55 rear, torque tube still,omaha orange, still 6 volt, RPO green glass, side carrier spare, all done
In the DITY Gallery
Video of the 261 running

1964 GMC 1000
305 Big Block V6, sm420, the next cab off restoration