If I replace the cuffs on my bike I thought of using a small tip on the oxy acetylene torch to heat the bolts but after looking at this pic, like the idea of an induction heater better.

 

Heat gun should work. Any kind of torch anywhere near the case is going to be risky.

 

I got a heatgun that does 800F+ for like 20$ on amazon, considering what Fuelmoto does, perfectly inexpensive way to handle it.

 

+1, we've removed literally thousands of tappet cuff bolts using this method with zero issues.

 

but if a guy did not want to open his cam chest heating the top of the bolt would be the only option.