First off I finally joined to the fact I cant find my answer anywhere and I follow this forum quite a bit on power train and chassis stuff. My rig isn't period correct for the traditional hotrod community but do to my Classic styling, simplicity, and uniqueness I get a lot of attention from the classic car community. A little back ground, When I was 14 I had a part time job after school and full time summers. My father found me a 1976 Chevy luv for $250. I bought it and decided to go after the classic hotrod theme. Started with a 350 Chevy, Turbo 400, and 9" rear end. Growing up around cars, bikes and fabricating everything on this truck I have hand made. Being I started it at 14 and now look back at 24 I am realizing some of my "lessons/Mistakes"? Anyway married with my own boy makes money is tight. I keep blowing up my th400 because I cant afford a $1500 rebuild and I have tried to many times to repair it. I have Purchased a M20 thinking it will go nicely behind my 377 Chevy (which I had contemplated building but a few of you guy's stories convinced me to destroke a dead 400). My 377 is a budget build I did myself probably 350-400 horse 6500 red line ( one 1/4 mile pass at 12.23sec @111.3mph). Truck weighs about 3300lbs with me in it. I want to know if I will be safe to run the Muncie m20 stock with a 15lbs flywheel and stock clutch 10.5"? Equivalent to a 68ish Camaro? Do I need to upgrade the case or mid plate? I have a scatter shield and run slicks when I get to the track. Maybe 2-3 times a year but I do street drive it in the summer. I would really appreciate any help. Everyone on this forum is very educated and I trust enough to ask. Thank you again. gary