I absolutely love the YF (carter I think). Until hi alcohol fuel it wuz 'set it'n forget it" I could come out in the winter after a 3 mo sitting (w/o use) and it would start right up, idled great, had no hesitation or other qualms. A 1904 is beautiful (w/glass bowl) and era correct...
I must say: Every automotive Q is answered by the APPLICATION answer. What will you use the rig for? 80% of the use's RPMs, mall crawl, mud. rocks, etc..?
Will U instal urself, what is ur level of expertise, etc, etc
I like the pinto carb (the 32/36) if going 2v and may B the best ever made 2v the 2100.