Aoshima 1/24 VIP Kits

Is anyone familiar with the Aoshima VIP Series or Super-VIP Series? I just got the Crown Majesta 151, Crown V8 Royal Saloon and Celsior 21. All of the above are Junction Produce kits. My question is, can older Toyota Crown kits be converted to Junction Produce? Because on the website (JP), I've noticed that 88 Crown and up is the earliest it goes. I'll upload pics of my completed kits later on.