ALDL serial data display?

I'm looking to buy a scanner that will read and display from pre-95 ALDL the same kinds of serial data that is available on most cheap OBD2 scanners...…..Does such a product exist, or does this expectation exceed the capabilities of ALDL connectivity?.....
My vehicles are 94 GMC crewcab dually with 454TBI and 4L80..... 91 Olds Custom Cruiser wagon with 305TBI and 700r4 ….. 91 g20 van with 350 TBI and 700r4... and a 69 van that is getting 454TBI and 4L80 from a 95 suburban...….

I decided on TunerPro RT instead of a scanner. If you are OK with a laptop and an ALDL Cable instead of a scanner, then TunerPro RT might be an option to look into.

dave w