Practically never go there, maybe once or twice a year tops.

But if shipping is an option, pls feel free to PM or call and I'll hook everything up

Thanks for the offer, regardless of how it works out

Did some more detective work and it appears there is a possibility one head is machined to the old spec for old rockers, but I don't have an answer for the other one.
Hopefully 4 or 5 more phone calls/emails tomorrow will get us what we need.