Does any1 know if a radiator 4 a 4th gen will fit and work in a 3rd gen?

 

I don't think it will work. LT1's have a reverse flow cooling system, so the in/out hoses are reversed. That's not to mention size differences, but i'm not sure exactly the dimensions of either.

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1996 Trans Am WS6 (Ram-Air)w/K&N, airfoil, Lakewood LCA's and Panhard Bar, Dynomax Ultraflow race muffler
3rd gens formerly owned:
Red '88 IROC-Z LB9 5.0 TPI (can be seen in Featured Rides)
Red '85 Camaro LG4, converted to 355

 

one off of an LS1 MIGHT and i stress MIGHT, simply because the LS1's are not reverse cooled like the LT1s are.