My home inspection of Speedmaster heads

That's the issue with all those heads in seen. The throat is too dam big for the valve size and valve job.

The options are use a bigger valve and keep the 45 or use the 2.02 and use a 50 degree valve job.

If I can fit the 50 degree seat on the valve face that's what I do.

Just looking at these things I'd love to try a 2.055 valve with a 50° seat. I'd also get a .050 shorter length so I could sink the valvejob a bit so as to get a wide top cut and not have geometry nightmares.