It was the way mountain bikes where in the early 80s. Back then, head and seat angles were very slack and there was no specific mountain bike tubing. So, I made a lugged frame with Columbus SP Tubing (it was the heaviest tubing available at the time). It had a 1 inch top tube, 1.125 inch down tube and seat tube. It was a 60 cm center to center, with a level top tube. Head angle was 68º and seat angle was 70º, 62 cm center to center top tube, 5.3 cm of rake, 46 cm chain stays and drop of 4cm. I don’t remember what kind of lugs I used. I used a Mountain Goat Fork Crown that I brazed over the mountain goat cast into the top of the crown. I got it from Jeff Lindsey of Mountain Goat Cycles in Chico California.
I had all the parts anodized black. It had Suntour derailleurs and thumb shifters, Specialized Triple Crank, hubs and headset, with a Regina Oro 5 speed free wheel (“that’s right, before the freehub existed”), with Martano Italian made rims and Specialized Ground Control Tires. Shimano cantilever brakes with Magura brake levers, Campagnolo Seatpost and Quick Release Seat Binder, Avocet Touring II Saddle, Bear Trap pedals, and a Bull Moose handle bar brazed by Tom Ritchey.