The rear is an 8 3/4 with 391 gears and 275/60/15 tires. Super stock springs. However, I just added caltracs last week. The front is slant six torsion bars with the 73 to 76 disc conversion. However, I am now switching the disc brakes over to Wilwood to help reduce some weight and reciprocating weight. Rear brakes are drum. All four corners are double adjustable Viking shocks.whats your suspension set up ?