Google Fram and look up transmission service kits for a 727 and a 904. That way you'll be able to see the difference. On a bad guess, the 318 engine probably came with the 904. That however is not 100%. If my mechanic didn't know the difference between a Chrysler and Ford transmission, I'd be looking for another mechanic. I just looked up the ad for the Swinger. Nice looking car, and for sure that engine is a Mopar engine. Factory decals tell you that. Engine is factory blue. As 413 said, the factory does not paint transmissions. At one time up here, all AAMCO shops painted their transmissions blue.
By the way, I like the green color. Attached is a photo of a 74 Challenger Rallye I owned about 10 years ago, also green exterior, interior and vinyl top. Bought it from the original owner in 2002, with 32000 miles on the speedometer. 360 4BBl. engine with the 727. Another MOPAR I should have kept. :thumbsup:
View attachment 1716318677