I bought them here. They were on a 6 second dragster I’m told.
Interesting thing is the gentleman who owned them originally lives 20 minutes from where I work. I’ve tried finding his phone number but I have an address and plan on stopping to see if I can catch him at home.
He did come in second at Bandimere this past summer so he is still racing. I was told he pulled the small block for a hemi.
That’s what I know so far. The heads have been off the car for 6-8 years or so.