Dave, I have no experience with Don. Awhile back I guess he built this set for Daniel Puckett. I am going to try them out. I'm pretty sure Don posts on DTR, you could start a thread or PM him there. I know KTA isn't too found of him LOL.
Unfortunately thats what we have to put up with/deal with when dealing with vendors on high performance or something above the norm for a 1st gen. Its sad, you basically have to know what you want, tell them the hole size, number, lift, spray pattern, pop etc. Since most of us don't know, and the vendor doesn't have alot of experience with our 1st gens, I don't know what to do. Stay stock I guess

. . None of us want to spend $800 for a Lucas POD equivalent edm injector.
I never got a call back from Scheids on the edm's. Another example of vendors not taking us serious

.
Hmm, I hear Kent Crowder got in with Scheid's from dating/marrying a Scheid daughter?? Anyone know if KTA has a sister :-laf

?? Just kidding Brian!!
Dave on the cores, sorry, no extras, just sets. I've yet to find a rotary pumped 5. 9 CTD core in the junkayrd, only p-pumped cores :-laf .