Anyone running a 904 behind a 340?

fishy68 said

Yes and no. Back when they were made the friction materials weren't as good as today's stock replacement clutch plates and bands. Also given the fact that the factory tolerances were all over the board made the design of the 727 the fool proof one to go too behind a high perf engine. Were lucky today to have the benefit of much better friction materials and have figured out what clearances work best so we can make a 904 live behind something making twice the power it would originally handle.

Click to expand...

Are you only referring to clutch pack clearances. A friend of mine locally runs a 69 dart 11:20,s with Griner brake which he claims has low band apply. Launches wheels up every pass. He just destroyed his roller clutch. Cannot get the drum out of the case. Claims to have an aftermarket reverse servo. Drum,band,and servo all in good working order. Anyone care to explain this failure. He thinks he needs the new better aftermarket roller clutch. He says the trans is late 1960,s model. This motor is a 360 cubic inch with j heads.