The vin plate on dashboard matches the body tag. I think the plate was affixed with a resin before rivetting and then hastily swiped 'clean'. Do you know of any other Firebird that used a 1 there? It COULD be a factory mistake. Any other clues to look for as an engineering test car? It's a mid 69 year car, that was palladium silver. And its unusual it has #62 heads on XB block. I appreciate your help. I'll order a build sheet too.
On my intake and heads I noticed dark blue paint under the Firebird turquoise paint. I believe they are GTO. The intake and headers are 1968. Also, for some reason, someone spot welded over the block number (behind #8) and left only "079". There is a casting mark on the side of block stating "350". Was a GTO engine going to be a possibility for 1970 firebird?