Suggestions for new design Aluminum Mopar SB clean slate (kind of) cylinder heads

I’m assuming you’ll be setting them up for SBC rockers.
If not, I’d suggest you do.

Make sure the pushrod slots will easily clear the use of 1.6 rocker ratio.

Make the spring installed height at least 1.800”, and 1.900” would be better.

Valve/rocker positioning to fit/accommodate 1.55” springs would be nice, along with making the heads accept that diameter without needing extra machining.