This TA cover lists GN and GbodyParts also sells it for GN.
"Original Chevy 8.2"/8.5" 10 Bolt Rear End Girdle fits all Chevrolet and GM corporate produced cars and light trucks with 8.2" & 8.5" ring gear and 10 Bolt rear ends, including the Grand National "
TA_1807-GM 8.2"/8.5"/8.6" (Chevy) 10 Bolt / A
www.quickperformance.com
Thanks, I actually found that site last night because I was doing some googling. However I was already ordering stuff from Jegs and I figured it was easier to order everything from one place so there's less to track. If it turns out the one I ordered doesn't work I'll turn around and buy one that specifically states it fits a grand national/t-type or 442 rear.
Also I know it's personal taste but I really like the big cast in cooling fins, I don't know if they're really all that functional or if it's the least bit necessary, but it looks cool in my opinion, and should theoretically ad stiffness to the cover.