Based on the Classification, a 3 door `982 Mustang has a shipping weight of anywhere from 2,555 to 2,582 (depending on base model, GT, GLX or GL body). There are two, 1968 Ford 302's listed. One is a 210 HP NHRA rated, one is a 230 HP NHRA (de-rated to 200 with OEM heads or 230 with Replacement Heads). Using the 210 version, in the GLX body, the weight break is 12.29, making it a natural GT/I or GT/IA, and is permitted to also run GT/H(A) and GT/J(A).
http://www.nhra.net/tech_specs/class...s/1968FORD.xls
http://www.nhra.net/tech_specs/class...s/1982FORD.xls