Help ID these heads

[n2oracer]

I bought a set of used Brodix heads for a SBC. The code on the heads identify these as being the -8 STD heads. They have "BRODIX" and "DIAMOND" cast in the rocker area. There is also a "-P" stamped below the Brodix logo. The end of the head has "DRE 83765" stamped into it. All the guy at Brodix could tell me was that it was a -8 and was cast for an engine builder. I know these heads are pretty old. Anyone recognize any of these markings or have any info about them?

[SMITHBERGRACING]

Diamond Racing Engines, give them a ring with your numbers.

[n2oracer]

I tried that. The number Brodix gave me is now Diamond pistons. They said that part of the company was sold about 10 yrs ago.