There should be a drain hole in that boot at the bottom to keep from trapping water. Looks like yours might be there but can't tell if it's installed right side up. I poked a hole in mine
It's not quite an AVS2 but it works good. Definitely hit or miss depending on what engine it gets put on but I wouldn't turn a free one down. No way I'd buy one new at $400 or whatever they're asking
I've had two things cause that: mismatched needle/seat and too much float hang. Needle/seat was too tight and wouldn't slide easily. Too much float hang and it gets stuck in the bottom position after sitting without fuel in it.
It's a slight pain but you learn a lot doing it yourself. I had to make a few tools along the way. Best tip I can share is to use a wheel/tire/axle as a stand to work on the diff. That made things waaay easier than trying to wrestle with the pig on the floor or workbench
Spitfire shorty headers to 2.5" downpipe, 2.25" to mufflers, 2" from muffler to rear bumper. Dual Thrush turbos. Was supposed to be 2.25 the whole way but I'm okay with how quiet it is.