90% sure I have a burned valve on no 4 cyl on the 440. Cant get a leak down tester into the plug hole just to tight to the inner fender with the try y headers. Seriously thinking 440 source heads.
On the wagon I think I used a street el to pressurize the cylinders where there wasn't enough room to come straight out.
Lemme see if I have a pic 'cause I don't remember exactly