The stock transmission in my 1990 Formula has started to slip just slightly. I am also building a 350c.i. for the car. I know the stock transmission won't last long after the engine swap anyway. So, I thought it might be a good thing to go ahead and upgrade now. I have looked at the TCI, B&M and Hughes transmissions. I don't have the knowledge to tell a lot of difference between them. Does anyone have any experience with these?