needing a new rear end and advice

grumpuscreature said

Valiants and derivatives (Duster, Demon, Dart Sport) were 108" wheelbase. Darts and Scamps were 111" wheelbase.

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You are wrong how can you say the valiant was 108 inch and a scamp is 111 inch?????
THEY ARE THE SAME CAR!!!!!!! One is a four door and other is a 2 door.......

Duster, Demon, and Dart Sport = 108 inch wheelbase
Dart Swinger, Dart 4 Door, Valiant 4 Door, and Scamp = 111 inch wheelbase