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I was referring to original equipment seats with many miles on them not new seats.

Or if not going hardened seats use lead additive for no more miles than you drive. :D

I’ve always been under the impression that after decades of use and hammering by the valves the stock 60’s leaded seats become effectively hardened. However any valve job on hardened or unhardened seats lose all hardening regardless of how it got there. The hardening is only thousandth’s deep...

I’m guilty of using both types on older Mopars that I serviced often and was frequently under the hood. I’ll have to reconsider and may do as @thrashingcows suggests. I liked the benefit of being able to clean out the glass one, which was handy after cleaning out a gas tank that had rust...

If you can recall who posted the video that would help narrow it down or who was discussing it. Understandable if you don’t

Another lengthy discussion Headers. Why?

Will the 66 mounts work with a later block and stub frame or not? I had a 64 casting, 65 model year 413 engine in my 70 RR for a while. It used same motor mount as the prior 383 If I recall correctly.

Time for a 440

I saw a vid that said 505 and 3.23. Very impressive!

What gears, cu in, and converter MEV?

That is considerable and about what I’d figure on a car that strong, but not worth it to me for the hassle of dealing with headers on a primarily street driven car. Totally get it on a car raced often or where absolute best E.T. is a top priority. No disrespect meant to anyone who prioritizes...

Thanks for posting the drag video

is it an Imperial?

If the cam doesn’t work out for you perhaps this Camshaft characteristics?

And there’s your dinner

Might as well provide brand and tire dimensions in full ie 235/70/15 etc while you’re at it and verify rear end type, most likely 8 3/4 but take a look to verify.

:thumbsup:

I guess

But nothing looks like a 426 Hemi

Im interested