Head Casting numbers 8445 vs 6293

[Twil]

I have a set of heads on my Turbo Regal. One has a casting #8445 (driver side) and the other (passenger side) is #6293. Can these be used on the same engine? How screwed am I? I bought the car this way- and it has been running fine (best of 12.60 w/ stock turbo and mods).

Brandon

 

[onefastcar]

I think you'll be ok read this.
http://www.turbobuick.com/forums/showthread.php?t=174142&highlight=8445+6293