I use a ferrea 1.90 intake valve. They can be ordered in that size. For SBC.
PES (Precision Engine Service) Clyde Norwalk is owner. 704-843-5477
Waxhal N.C.

I have used PES lumps in my own engine. They fit like dog****. Either the HI-FLOW brand or Larry's are far superior in fit and finish. Having installed all 3 brands, I can say this.

I will get a few pics of the cast iron in the intake chamber wall. Tom

Inliner Member 1716
65 Chevelle Wagon and 41 Hudson Pickup
Information and parts www.12bolt.com