The 194 manifold I have is for a tiny 1 Barrel. I'm assuming the 250's had a 2 barrel?. It didn't dawn on me til today to check the local pick apart. Hes got the set for $60. I really want to drive my nova around, even with the stock motor for now. But the powerglide has some issues. When you get up to speed and ease up on the throttle, it will shift back into first. I was doing almost 60 the first time it did it. I've almost got everything for the T5 swap. I just need the pedal assembly, and the linkage. A friend over on StevesNovaSite has it all for me but money has been tight. Hopefully soon though.