3.1 Leaf springs – Chevy and Chrysler allowed. 3.2 No pull bars, No 3 link, No pan hard or j bars allowed 3.3 May run Ford 9” with bolt in axles, full floaters allowed. No gun drilled axles. No wrap up style axles. Both axles must measure same diameters. ...
Any intake- no porting or polishing. Stud mount rockers only. No stud girdles. Stock diameter valve springs only- 1.250” Maximum O.D. (Beehive Spring Allowed 1.310” maximum O.D) No double valve springs. Any manufacturer (Chevy,Ford,or Dodge). Any Steel, nonported/polished cylinder head....
ENGINE:Must be stock for the make and model except no 400’s or larger small or big blocks. Cast piston only, Chevy must use 4 equal valve relief pistons. OEM crankshaft only- cannot be lightened. No aerowing, bullnose, knife edge, undercut or drilling of second or third rod throws. ...