I'm going to go roller rockers and solid lifters I was going to stick with 1:5 ratio and run a 2500 rpm converter I also have a 670 Holley vacuum secondary's and I have been reading about the efi systems. Maybe that's the way to go idk
Which 670 Holley do you have? If it's a street avenger, I'd keep it on the shelf. I tried one on my 340 and it ran like crap. For engines with a bit of camshaft, the idle circuits are way too lean on those carbs. You'll have to open up the idle feed restrictors to keep it from bogging down. The 750dp will be a better carb for the motor IMO.
