I'm having the front straight axle on my 53 Chevy 1/2 ton pickup altered along with 57 Bel Air 2" drop spindles so I can put my 12.88" Wilwood disk brakes on it.I have done some searching and some say negative and some say positive angle. This will be a driver that might end up on the strip if I happen to pass by at check in time. I believe the blown 292 weighs less than the 235 even with the 4-71 blower. I plan on running an 8" wide tall tire. I need to give my fabricator an angle. Thank you for your time and advice.