I have a badly mangled spark plug hole that is far beyond just running a tap through to clean out the threads - already tried that. Anybody have any suggestions for repairing this?

I don't trust the cheesy tap & sleeve kits from Kragen/PepBoys/Fill-In-The-Blank...

FYI the heads are off the car so it wouldn't be hard to take to a machine shop. Motor is a 355 LT1 with only about 9:1 compression currently but will be getting a supercharger soon which will increase combustion pressures significantly, so the repair has to be strong. Don't want to launch a plug thru the fender !!

Thanx all,

Chris

 

take it to an auto machine shop, they should should be able to weld. drill and tap the hole, will be just like new