Casper393W wrote:I did verify that I had fuel pressure at wot. I ran a line to my gauge on the wiper cowl. The carbs are mounted in-line and
my main jets in the primaries are 66 with a PVCR that was .046 and increased them to .054. My air bleeds are untouched stock but I haven't measured them yet. The secondary plates have been drilled to .072 I'm running 8.5 power valves...
Your #66 MJ with the .054" PVCR is in the ball park and has proven OK up to this incident, so no criticism there. On a pair of these carbs for T-Rams I usually use #67 MJ with .046" PVCR so not enough difference to worry about since it has run OK.
The secondary plate I usually use .076" MJ and .040" IJ, so you may be a little lean with only .072" MJ but it shouldn't lay down.
I think you may have a bowl vent situation with air filter or no air filter. Did you ordinarily run it with filters and after adjusting the linkage run it without filters? A couple years ago I coached a pal who was tuning a pair of 1850s on a nearly stock 318 Mopar with a genuine Mopar tunnel ram and he was road testing with and without filters and not saying anything about it, thinking the filters didn't matter. As a result, the erratic situation of "I put in bigger jets, why is it leaner?" and "it bogs today but didn't last week," turned out to be the filters were there sometimes and not others. LOL now, but ..... grr... with the filters on it runs like a million bucks, gets good mileage and everything.