Don’t heat it !
Even if you where able to get it red hot you will change the tempering on that bolt and only make it more brittle ( hard) and more likely to snap.
If you do snap the bolt after making it harder then for sure drilling it out will be extremely hard to do!
If it where me I would remove the exh manifolds, but seeing as what that bolt looks like your going g to bd snapping some of those bolts also, and then that forces you to yank that head to get back to square one.
If you get the car to a shop with a mechanic that’s good with a torch, he can melt that bolt out and then a heli coil can be installed, which it looks like what would have to be done even if YOU had got the bolt out already.
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Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs!
And he was not talking about 1/8 or 1/4 mile ETs!
1) 1940s 100% silver 4 cup tea server set.
Two dry rotted 14 x 10 Micky Thompson slicks.
1) un-mailed in gift coupon from a 1972 box of corn flakes.
Two pairs of brown leather flip flops, never seen more then 2 mph.
Education is what your left with once you forget things!
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