Go to a gas equipment supplier and look see whats on offer, especially as you like a few of us here have experience of professional gas cutting/welding/brazing/heating kit. Dont waste your time with the hobby stuff like the EZ torc, hoses and tanks and equivalent. You mention Prestolite, ive a real beauty circa 1920 minature oxy/ acet/propane torch, the brass hose fitting are 1/8th bsp !!
go for proper oxygen and propane tanks, the largest you can store ,with 2 stage regulators, the proper type of hose for the gas and an industrial type hand piece. you can always fit a small torch to a big supply setup but not a big torch to a small system. I use a 47kg propane tank and a 200ltr oxy tank at 300 bar.
A torch is one of the basic bits of kit you have to get right.
Do your research, look at everything,on offer, dont buy on line,but develop a personal relationship with the equipment supplier.
Best investment you can make.
Once you have kit this size, you then can put in a T junction to feed the propane to say a general heating forge.
Ive several As follows
I use a bicycle stand that is circa 1920, with a cast iron 4 legged base. then it has a 1in piece of water pipe some 3ft long upright. then i made a 8in sq rt angle frame bolted horizontally at the top. inside of which i have a weldmesh of 1in sqares . underneath I have a 1,1/2in dia upright propane air torch bolted to the 1in tube, turn it on and i use stainless gauze as a domed cover over the metal im heating this concentrates the heat as well as seeing how hot its getting. Use it to anneal, punches anneal coils of wire , so with a long say 12in flame anneal the 1 yd long twists of metal for the bracelet material ive mentioned previously.
Its probably the most important gas heating setup I have.
As an aside, When in the production of a 2500 plaque order in bronze, thats to be hot drop stamped Ive taken this forge and extended it with a lift up lid also i then can see through stainless the gauze, . when the metal is inside the atmosphere is in fact oxygen free so theres no oxide formation. I lift the lid pick up the redhot metal, place in the die and strike.
Getting back to the long metal annealing, with this setup I anneal say 2in wide by 2ft long by 1/8in thick 70/30 brass with no problems. To quench and pickle I use 4in dia by 36in long plastic drain pipe with a sealed end full of old battery acid. dunk hot and it comes out shiny!. then rinse and dunk in alkali water, sodium carbonate. rinse then dry. Then continue power rolling down to whatever I need.
In this case your taking the work to the heat, with a hand torch you take the heat to the work, like brazing on the loops on the sterling buttons I mint. I use a jig for this,can do some 40 an hour.
hope this helps.