well its a 670 VS street avenger, so I beleive it uses the smaller needle/seat...something like .097 (going off of memory here). I purchased both a new holley float and needle through Jegs .. I dont recall what the needle/seat part number was
the numbers on the airhorn are
"I always like to start with a "dry" setting method, which will get you VERY close, followed by a "wet" sight plug inspection and minor adjustment."
I do the same
yes, I have a regulator and a pressure guage inline