Modifications to Offenhauser 1 1/2 carb spacer Thermoquad to Holley pattern ?

Theres some ahots of the adapter you suggested. Minimal grinding. I will have to get a divider bar welded into it to keep the intake dual plane.
Thank you for your suggestion.

View attachment 1715819802

View attachment 1715819803

View attachment 1715819804

View attachment 1715819805

View attachment 1715819806

View attachment 1715819807

View attachment 1715819808

View attachment 1715819809
"Keeping the intake dual plane" or not will have little to no effect on operation. But hay your circus your monkeys. Have fun!