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I don't think you'll find any of those are actually made in USA. Even the Hein-Werner is "assembled in USA", which means they just bolted the wheels onto an offshore jack. All will have, at best, a Shinn Fu pump.
I've been out of the tool business for eight years now, but my customers who bought the NAPA jacks were always pissed because the jacks failed in a year, if they even made it that long.
Old USA, and I mean old jacks lasted the longest. New ones, not so much.
Every jack today, no matter if they claim to be Made In USA, has a Chinese Shinn Fu pump since they own all the rights for manufacturing. Sure, there might be some sketchy Pakistani or Indian pumps out there, but for the...
The Flowmaster FlowFX and the Cherry Bomb Salute are the same Magnaflow copies from the same factory in China. Same basic part number but the CB are a few bucks cheaper than FM. Stainless steel, straight through, fairly quiet until you put your foot in it. Engine Masters did an under $40 muffler...
It looks like the bearing/wheel on that one lifter was not real happy looking at the wear pattern across the face of the lifter (not the scratches around the circumference of the wheel).
I've come across their parts on E-bay and scroll right by because their prices are ridiculous. All of their glowing reviews are obviously fake. I find it hard to believe people actually buy anything from them.
Those valve springs with 175# on the seat are way overkill for that cam with hydraulic rollers. A 400# rate and 120# seat pressure would be plenty, which looks like what Howard recommends. You could use a quality 5/16 .080" wall pushrod with those springs.