no they're not blue thunder,in fact if you got them from a dragster guy then they are probaly one of the sets I used to have, what were you looking to know?
at one time I had 3 pair of these
I did have a few questions.
The humps in the exhaust ports, do you think that there would be any advantage to removing them? If the heads were experimental, I am thinking that the hump must have not been much a good idea because no other heads that I have seen use them.
Do you have an estimate what these heads power potential would be?
Did the other sets you had have porosity issues as well?
Are these heads more suitable as "collectors" items than a performance head? I would be happy with 600-650 HP on a 545 stroker. They need some work done, guides, valve job, resurfacing, and possibly having the chambers coated. Would you think that they were worth putting money into? I am not in the position to drop a couple grand into a new set of BBF heads.
My pistons are flat tops so I would need large chambers to keep the motor pump gas friendly, do you remember the chamber size?
Do you know if they have hardened valve seats?
Thanks for your time.