+1 on the heat. A regular propane torch is often not enough though. The cans that look just like the propane ones but yellow are MAP gas and they will get the steel to cherry red pretty quickly. You're not supposed to use a regular propane nozzle with them and I never would but I've heard that they work.
John
1985 Eddie Sanders ATC330r
1986 Monstecate
1984 ATC70 (awaiting 125cc transplant)
1984 ATC125M
1986 GSXR 750 - Keepin' it old school!
1999 Arctic Cat 500 4x4 plow machine
1999 Arctic Cat Thundercat 1000 (lake lizard)
1996 Arctic Cat Jag 440 L/C (ditch banger)