My first trike was an atc90 when the only trikes were atc70 and atc90. It was used and it was a christmas present. Had it for a few years and once I went in the service in 1980 and saw my first 3wheeling mag in 81, well, it was all over. Aftermarket frame and lots of aftermarket pieces. Luckily most places didn't mind shipping parts back then to a FPO address.
Nicholson 500x (Project)
Nicholson 185s
Nicholson 110 (That takes an atc70 tank)
Ascott 500 head/350x (Project)
Homebuilt Racer Chromoly Suspension 110 (Ragin Runt)
PK Racing Suspension 70
A+ Inc Suspension 70
AWS Aluminum 90 frame
Hi Performance ATC Suspension frame rd350
Hi Performance ATC Suspension frame 90