sure is a beauty... i love to hear stories like this. nothing more special than something that was bought new years ago and passed down through the family.
as for the mounts, i was going to go with BRP
http://www.brphotrods.com/Truck%20LS1.html but they cant garantee that the stock a/c will work in the stock location. still reasearching this...
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"Dennis the Menace"
1978 Silverado (2wd, 1/2 ton, short bed)complete nut & bolt frame off restomod LQ9/4L80E
MY LS SWAP/FRAME OFF BUILD BOOK
2006 TBSS way too much to list