I finally picked out a new cam for the 540. I decided to go with a cam I knew would work. I went with a Lunati Voodoo HR, 231/239 @ .050, 600/600 110LSA. I ordered it on a billet Gen 6 core with everwear gear option. It's the same grind cam that I got from Harold years ago for my 468. My 468 always ran good with it.
I drove the car tonight and it runs good! Runs real nice at low speed, idles at 15 in vacuum and seems fine in overdrive and pulls hard to 6200! It was a little hard to get a full idea of it because my carb needs quite a bit of work.
So here is where I am at now.. I have the MSD distributor set up with the black bushing, 1 heavy spring and 1 blue (light) spring. I have 18* initial 36 total with an additional 10* from the adjustable vacuum advance can hooked up to full vacuum. Yes, the curve is conservative with the 1 heavy and 1 light spring but I'm concerned about spark knock due to high cylinder pressure with that smaller cam. I can always change it later but first I want to get the carb in the ball park.
The carb is a Q series Quick Fuel 950. I just pulled it off and am putting it back to it's original specs as a starting point. I put the original 78-86 main jets back in as well as the 70 IAB and 32HSB. I did leave the 6.5 PV instead of putting the 4.5 back in. Years ago I lowered the IFR's so I will leave that mod and I am thinking about going with .035 for the size of the IFR's. I had also drilled the main body for TSR's but I put the original number 64 drill size back in but at least they are now tapped so it will be easy to change them if needed.
I don't want to turn this thread into a "what I could have done to make the other cams work" thing. I am happy with this new cam, I just need to fine tune it now. If anyone has any suggestions or experience with the QF 950 on the carb tuning feel free to comment. I will report back once the carb is back on and I drive it.
Here is a short idle clip, https://youtu.be/3ARpiTASa0s