Heat will help. Liquid wrench will flare up and burn off. But I don't think you will get it hot enough with a propane torch unless you have a big one. Need to get it hot enough, red hot, to allow the indentation from the clamp to "relax" enough to allow separation.
Heat would require an Oxy/Act torch but probably not a good idea as your near the gas tank right?
The the pipe you are replacing is inside the muffler pipe then cut it off where the muffler pipe ends and you can grind/cut out the remaining piece inside the muffler. Or leave it and expand the new tailpipe end to fit over the muffler pipe.
66 2+2, 289 Ross, TW, CI TLSR, Victor, Demon
Were the pipes held together with a muffler clamp? If so the clamp squeezed the two together and put a small crimp in both of them. Pulling them apart is almost impossible.
If the pipe is INSIDE the muffler and you are replacing the muffler then get a cutting wheel and start cutting a line down the length of the pipe. Cut deep enough to get through the top layer the use a chisel to peel it back.
1967 Shelby GT350, dark green, 347 stroker, 5-speed, inboards, #2206
1973 Mustang Convertible, white/white, black stripes, Q-code (351C-4V), ram air.
1968 1/2 428 CJ convertible, R-code, red/deluxe red, auto, finally finished.
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