I wouldn't be sorry for Grog .. this is a precursor to the DOHC swap.
I saw the dohc heads today.
I brought one in to start assembling it.
I always was under the impression it was the valve seats leaded fuel was needed for on old engines, later engines switched to hardened seats after it was outlawed, while the cylinder wear was due to the frequent fuel wash from carburetor.
A 351C would be really cool, IMO it's the best OHV V8 Ford engineered (slightly copying the big block Chevy)
Sealing in general was helped by the lead additive. Rings and valves, and also raised the detonation temperature. But is toxic as fuck. It's that tan powder you see in old engines. Actually, most of you have probably never seen that, which is a good thing.
Yes the lead is primarily for the valves .. carbed engines in general need a rebuild every 100k.
This was the thing I love about the 4.6. Rebuilding an injector is so much easier than a holley, or rochester, lol.
So I was fortunate today; I found an undamaged crank!!
It's the npi crank out of the red cougars engine. As soon as I get the red cougar running, I can yank Lazarus' engine, get it on a stand, The crank was the big holdup. I'm going to measure all the journals, but it looks great, for 233k miles.
I have 4 sets of rods; two mark sets, and a npi set. And a manley h beam set.
The pistons I have are 3cc; it will be a high compression engine.
I'll look at the ones that come out of laz's engine; one of the redcougar pistons has divots out of the top, from being driven 60 miles while making contact with a valve.