Changing from a 3 speed auto to 4 speed auto

[hawkgoalie31]

Hey Guys,

I m thinking about changing my 904 3 speed trans to a 4 speed trans in my 1974 Plymouth Duster 318. I would appreciate all the pros and cons if anyone has done this before and where I would go about getting a 4 speed. Also any info anyone has to offer.

Thanks

 

[needsaresto]

I have an article on this.Lots of good info. Need an email..p.m me.

 

[hawkgoalie31]

PM sent thanks