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I have zero brand loyalty. Looks like a super nice survivor! Congrats and enjoy. :)

Not sure about coolest but I like my stockish aftermarket wheels.

Not a fan of rev kits myself nor do I think weigh matters on the lifter. I see high end titanium valves. I've never seen a titanium lifter. As for turning 6800 with a rev kit and 10lbs on the seat, I think it would be very unhappy and your pistons were probably closing the valves.

It's not always obvious. :) The other effect there is that if it has say 150 seat pressure and 400 open and 1.5 rockers the pushrods/lifters are actually seeing 225/600 lbs

The lifter and pushrod weight don't seem to influence much as it's moving 1.5 -1.8 times slower and less distance than the valve side. (whatever the rocker ratio is)

Weight will make MUCH more difference on the valve side. So lightweight valves, springs/retainers/locks are very helpful. Rocker weight can make a big difference. Pushrod weight and lifter weight I'm sure can influence things but it doesn't seem to. So you want the stiffest pushrods...

There's some movement but much less with a polyurethane mount. I use a rubber strip.

They are great cars IMO. Only car I bought new was an 07 Z06. Built it with twin turbos then realized I have more fun with naturally aspirated stuff. For sports cars now changed to F355 and 993 C4S

It's not just pressures but can also be weak pushrods, springs very far away from coil bind at max lift, heavy components (large diameter springs/steel retainers, heavy valves). Just my guess as my 426 hemi dyno looked just like that when I first got it. (And it suffered from everything I...

This dyno? https://www.forbbodiesonly.com/moparforum/threads/hawkrod-is-doing-the-2023-hot-rod-power-tour.262286/page-13#post-912558901 If so, loss of valve control IMO

Nice! I was planning on switching to the TKX but have had no problems with my TKO. (Shifts nice at 7,750)

Post a pic.

His attempt at being constructive was rendered impossible due to your lack of useful information.

4.56 Dana/Spicer gear in my S60. They did a nice job, it's quiet.

I used this relay- Amazon.com Right and left hood light wires go to 4 and 9 Right and left hood light wires from car go to 3 and 10. 5 and 8 are joined/connected to 12v 1 and 12 is relay trigger so one from whatever your RPM based output is and the other to power or ground (depending on if...

I would only do multi port efi. Would rather have a carburetor than throttle body injection. Just my opinion.

I addressed cooling system airflow like modern cars. Building a duct to either block frontal airflow or force it through the radiator. Even on the hottest days it runs just over the thermostat. I would not alter the hood because I would not like the look.

As mentioned, backpressure is never desirable but going too big for the combo will reduce velocity. I would try extensions and also have a set that was a long taper/reduction from 3.5" to 3" or even smaller. If you can't get it back to where it was the other set of headers was likely better...

The bosses were machined for tie bar clearance. (for a smaller base circle). Whatever cam and lifter you want to use, just make sure it doesn't uncover the oil gallery at any point. (from base circle to max lift). If so, they will need to be bushed.

Having no taste or tact and being cocky about it? I agree. :)