I need to buy a flywheel, clutch and pressure plate for my 62 Pontiac(around 3600 lbs). The engine is a 350(first gen) with all the bells and whistles to produce around 400 HP(before nitrous, which I may install at a latter date). The tranny is a close ratio M21. The posi diff will house 3.73 or 3.90 gears. I have checked out the sites for the following mfrs: Hays, RAM, McCleod and Centerforce. Am I missing any? I have not checked out Zoom but I saw them in my Summit catalog last night. I know this is a subjective question, but has anyone had good or bad experiences with these or any others. Which brand/type would you recommend? Also, what are the pros and cons about the different styles of pressure plates, such as diaphram, B&B and long style. What about dual discs vs single disc clutches? Thanks.