Vintage Big Block Chevy header ID

[SuperNovaSS]

Dave,

Thanks for all the leg work. I was hoping these would be an easy ID but it looks like it may be a head scratcher. Yes, they do look quite big. The car was running a 68 427 that ended up being a L89 block. The guy I got these parts from ended up reuniting the block with the car.

69biscayne,

I think you are correct about the pan. It is definitely an interesting combination of parts. The heads are 1970 3964291 castings. The starter stamping comes back as 69 GTO but has a cast iron nose. The bellhousing is a 621 for the 11 inch clutch. All other parts look correct for a 69 l78 Nova likely built late January.

Thanks,

Jason