Aftermarket valves perhaps Egge, or H&J machine, Carrington, ND 701-652-3289I I haven't done business with these people so cannot verify results. If you have a competent local operator, they should be able to put inserts in the Cat guides.
Good luck Herb
TogNut: Did you check with Florin? Dana picked up a quite a bit of D2/D4 stuff awhile back.
I called Florin this morning. He had 1 intake ($15.00 ) and 4 exhaust ( $25.00 ea). They are on the way. I have 8 used intakes, we will grind them and see what they look like after that !
Thanks for the reminder Juiceman
HFDZL : I called egge, very nice people, they are looking into it. Thanks for the tip