I have an 88 gt made in japan and sold in cali and I believe mine is a mk1b from a video I saw that said the mk1b has a 2 piece for the front bottom part under the bumper, besides that I am unsure the difference between a mk1a and mk1b. I think the pre 87 models were mk1a and later were mk1b until the mk2 in 89? please correct me if i am wrong. Mine is the GT model, which means no super charger. I got it for 2000 but upon seeing prices of the 80s models reaching 6000$ I figured it would be worth dumping money to get it running.