is that a 4-v carb on an 2-v to 4-v adaptor on the early 2-v intake?
I have done that before on an engine.
a tear down and looky see with a mic/feeler gauge is in oreder to decide if its a good build on the cheap or will need other hard parts and rebuild,re-ring IMHO
it is the sitting out side for a long while ?
it is kinda like a used 727,looks good on the floor while it is for sale...but does it work after you chanced it like the uesd parts lotto
