Gonna remove my six pak for rebuilding/ tuning(running rich) I have 2 carbs to try.. and need a recommendation... 1st motor is 340 plus 30.. 11:1 comp.(maybe 12: 1 its old school) 509 cam 4 sp. 3:91s out back.. looking to use a nice ld340 intake I picked up. carbs are as follows : 650 dp..basically stock. 2nd holley 770 street avenger vac. secs.. what would u run... and why.. I am all ears...:burnout: I have heard these street avengers are problematic.. are they?