Most likely asked 10,000 times before but we are in Australia, on a budget. I'm building a 383/431 for my wifes 67 Dart, nothing to radical but 11.3 to 1 with sidewinders and a Engle 585 603 flat tap solid, 750dp on an m1 with an msd 6 digital, ol hooker fender exits, J converter with a shift kit, Ive got a 741 case on my 8 3/4, currently 3.23 gears with a lsd. not going drag radials or anything like that & I know the gears are wrong for that cam and converter but I'm looking at 3.7s or similar. My wife likes to race a little so I'm hoping the 741 case will handle it. your thoughts?