The '48 2 ton had a massive dent in the rear corner of the cab and a door crease but the reverse of yours. The door put a severe crease in the cowl when it was open too far.
I used weld studs to pull 90% of the cab dent and was about to do the cowl dent but got rained out today.
I don't use a slide hammer unless it is a small round dent. I put 4-6 studs 3/4" apart along a crease and clamp them hard into a wide welding clamp (they actually sell ones for that with a ring welded on for pulling) and pull the group with a come-along. That moves a whole section and avoids high spots you can get from slide hammering a single pin, and your hand on the come-along is a lot more controlled then slapping a slide hammer.
Also a stud welder is well worth buying because it doesn't over heat the metal like hand welding nails on. I got one from Harbor Freight for $99. Through the slide hammer away but the gun is as good as a $300 one.
