thanks for those numbers wayfarer !
X2
I like the looks of the 426 spark plug boots on the early HEMIs. When I built my other HEMIs they sold custom spark plug tubes that were flanged at the top for stock 426 boots. Those tubes are apparently no longer available
So that's about were I'm currently at.
A decade or two back I made a die to re-shape a 426 tube top to give a 45° flair that the 426 boot fits nicely on and the overall length works with most of the engines. If interested I'll (try to) post a pic when I get back to the shop (out and about for a week or so). I also have alot of 426 boots available.
Lets try a pic...
