As I think about it, all the engines I've worked on have had the heads close to the block. Actually, .049" away from the block in many cases. Wow! A 302 with W-shaped valve covers? And a 302 with the valve cover held on by stove bolts? And a V6 as well as a 4 cylinder 302? And even an air-cooled 302!
Don't understand what you're saying Gary, this is stuff you've worked on?
THANK YOU Brigette! PO messed up the firing order on my '93 F150 XLT 5.0 (302).
Changed 2nd and 5th plug wires and she fired right up.
She's now making that beautiful V8 sound that i was missing..
Picked up about 30 to 50 HP too!