A1) They are shared, has an h-pipe placed in about 12 inches from the collector flange. You know, you might be right, I don't recall a miss on that side before I put headers on (Dougs), that or it wasn't audible enough to hear with the old quiet exhaust and I didn't notice. There is no leaks I can hear of, but I'll pick up a cheap IR gun at harbor freight to check.
You may also find a carbon splash under or anywhere around the leaky pipe at the header flange, usually one of the center ones.
You need to get a helper with gloves on, standing at the back and cupping the pipes.Then bring the rpm up until the popping starts. The helper is to look for a reverse pulse in the pipe where the pipe seems to momentarily suck the glove onto itself. I know of only one way this can happen; if an exhaust valve is hanging open on the intake stroke. If the rpm gets to be too high,it will be difficult or impossible to perceive. I imagine difficult after 1200rpm, impossible after 2000.
A2) Idle speed is set at 950, in gear about 650. This is way to fast and smacks of a poor T-port sync, or secondaries not being closed.But the 300 rpm TC pull-down has me worried more; It smacks of a low torque engine.
A compression test may point us in the right direction.
A cam with a "little" lope should idle much closer to 700/750, and lose only 100 to 150, going into gear.
A3) As far as I know they haven't been synced by the last owner and I have not done so myself, but I will most definitely read up about it and follow your write up. NGK BKR6Es are the equivalent of Champion RN9YCs, so I think I am good there.
I agree
Once the T-port is synced I'll check timing and see what she ends up liking better, and I might be getting away with 35 because I throw Chevron 91 in all of my rigs, Cali gas is piss water with all the junk they put in it lol.
I have a feeling that 91 is more than you really need. I am more concerned by the 15* at idle. Something is not adding up here. I have rarely seen this mixed up a combination. That is; a very high idle and high vacuum with what could be considered a fairly high 15* of idle timing. Usually the 15*would cause the low-speed mixture screws to go dead when you try to idle it down to normal.
Q5)Are you running a working PCV valve?
Q6) Have you proved the TDC mark?
Q7) are the mixture screws working?
Q8) are the secondaries closed up tight, but not sticking?
Q9) the compression test results? Remember to crank until you see two successive pulses ,about the same, and over 110psi, hopefully.
A4) Stall is at about 2000 rpm, stock as far as I know. Well stock AFAIK doesn't say much, sorry to be blunt
