66' 170 with seized Spark Plugs

[okie4570]

Going over the 66' the other evening a little closer and noticed a little flashing around the plug wires, as they've got some age on them. So purchased plugs, wires, points, etc to change out. Well I'm on day 4 now of soaking with PB Blaster and not one of those plugs will budge. Ideas? And yes I'm wrenching counter clockwise.

 

[Rustytruck]

Run the engine until its hot and put a cheater bar on your breaker bar. Be careful their taper seat plugs when they break loose don't go flying into anything you don't want blood on. Make sure you use a heavy wall 6 point socket if you can. I once had a head where the plug was run loose. the plug got welded by the threads. When it came out we had to helicoil the threads in the head.