carter carbs

I'm assuming this is due to excess fuel pressure somewhere but I can't figure it out. Any help is appreciated. This W0 was rebuilt by Joe Jennings earlier this year and has less than 50 miles on it. The fuel pump is new late last year. I drove the truck a little over two weeks ago; popped the...

What year was the WO series carburetor replaced with YF series on willys pickup trucks with 4WD (4T) body style I have 1950 truck. s/n 46703 Would like to determine which series was furnished