NHRA Tech Department makes changes to the Stock Car Classification Guide Jan 22, 20191 min readJan. 22, 2019 The NHRA Technical Department recently made changes to the Class Guide, due to clerical errors as follows. Ford 330 425 added VMP SC #VMPG3R-6H066-AA-23 08 CJ Ford 330 435 added VMP SC #VMPG3R-6H066-AA-23 10 CJ Ford 330 450 added VMP SC #VMPG3R-6H066-AA-23 12 CJ 71345