Originally Posted By SCATPACK 1
IF you don't care, post up some pictures of the spark plugs and combustion chamber. I am intrigued by that design. Never ever saw it before. And I thought I had worked on every Mopar block ever made.

Here's a couple of pics for you. First to show you how the spark plugs are positioned and the 2nd to show how much taller these heads are than standard BB heads. The intake manifold is supposed to work on normal heads, but I have not verified this.
I'm planning on stripping it to the shortblock this weekend, get some more pics, and post for yall on Monday.

413 spark plugs.jpeg413 head height.jpeg

CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax