I want overdrive for my car, because revving to 3k every time Iget onthe freeway is just no fun. Right now I have an m-21 and would like to keep something similar to it in ratios. I want something that's easy to install, non-hydraulic preferably, and manual. Are there any good 5 speeds with overdrive? Oh, and I have a 67 with crate 350.
you can resize your drive shaft and add a overdrive unit behind the trany electronically controlled by a toggle switch this will let you keep your trany for drag racing i dont know who makes it or what its called though it would be pretty easy but not that cheap