It won't fit an early style tube.. The deal is for the 500/518 O/D trannies Mopar copied the GM design dipstick tube & seal... So they make a tube that works for smallblock 904's & 727's but the aftermarket copied that & made tubes to fit big blocks & hemis... Back in the 90's I bought the smallblock tube at the dealer & cut the tranny end off & welded it to a big block tube for my car... Lotta work but stopped the leak.. Now ya just gotta open the wallet...