New mighty max owner here living in Northern California. Picked up a 91 mighty max with 125,000 miles on it last night. I've already done lots of reading last night on the forum. But I have a question. I was able to talk down the owner because the radiator has a small leak. I was pricing out a radiator last night and I'm not sure if my truck is a base or a 1 ton. It's a regular cab short bed 2wd manual trans. Any ideas on how I can tell if it's 1 ton or base?? Thanks.