Join Date: Jan 2015
Location: Injun Territory, 'Merica!
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Managed to go out & examine several original core supports. Looking at your pics, & comparing, your customers coresupport is definitely a late '60's Pontiac v8 A-body, from the few pics, can tell that by the die stamping of the uprights. Chevy, Buick, & Olds did not use these die stamped pieces in their coresupports.
Through the years have ran across several different odd "fixes" to coresupports, not only ones coming out of own parts cars, but from restorable coresupports I've picked up in yards, swappers, & from other Pontiac guys. Again, looking at 3rd pic to the right, it appears the coresupport has been reinforced along the lower rail with some formed sheet metal. This appears to have taken up some room above the plane of the top of the lower rail. This would in effect not allow the top of the lower rail to adjust as high as it could. Ran across a similar deal where owner was trying to repair blown out coresupport mtg hole with steel plate cut from a lawn mower blade. When welded in on the top of the stamped lower rail, the "fix" limited the adjustment up of the coresupport. The fan is rubbing in the top of the fan shroud? Have seen this many times where coresupport mtg holes are rotted out and/or bushings are rotted out & coresupport ends up setting too low. If fan is scraping inside the bottom of fan shroud, you have another problem. Typically this latter & very common problem is caused by frame cradle sag, many times exacerbated by the use of new cheap Chinese trans mount (the junk mount is too thick). To get front of the engine up slightly & correct fan centered in the fanshroud, it typically takes pulling engine, removing the frame brackets, then tracing out & making spacers out of 1/8" steel plate to insert between the frame cradle & the bottom of the frame brackets. In last few years, comercially available frame stand spacers have come avail, but @ 1/4" thick, many times they are a litle too thick.