A-999 Swap and Information

As far as I know 904 came behind 273 and /6, 998 were behind 318 in cars, 999 were behind 360 from 74 till it was replace by the A500 in A,B,C,F,M,J body cars and light trucks and vans. The 2.74 low gear set was used in 904,998,and 999 in 1978 through the late 80's to help cars get moving with 2.45 rear gears. There were two 999 sold through Mopar Perf. p4130400 with man v.b. and 2.45 first gear, p4529688 with 2.74 first gear. The 74&75 A999 part# pn3681844, 76&77 is pn4028465, 78 non lock up is pn4028878, 78&79 lock up pn4028815,4058111,4130515,4130645 I don't have any numbers after 1979. Hope this will help some of you in your search for trans and low gear sets.