Steps to Convert a 1970 440 4bbl to a Six Pack Setup - Moparts Forums

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Re: Steps to Convert a 1970 440 4bbl to a Six Pack Setu [Re: fastnos] #2755658 03/25/20 12:43 AM 03/25/20 12:43 AM
Joined: Mar 2020 Posts: 5 Pontiac, Illinois, USA 7 70-AAR-Cuda member
70-AAR-Cuda member 7 Joined: Mar 2020 Posts: 5 Pontiac, Illinois, USA	Outstanding write up on the sixpak setup..... reminds me of the good old days...

Re: Steps to Convert a 1970 440 4bbl to a Six Pack Setu [Re: JohnRR] #2755805 03/25/20 01:24 PM 03/25/20 01:24 PM
Joined: Mar 2007 Posts: 3,285 West Coast, USA jbc426 master
jbc426 master Joined: Mar 2007 Posts: 3,285 West Coast, USA	Do yourself a favor and install a wideband gauge. I use the one from Innovate, and it really helps dial in the carbs. Be sure you have a quality fuel filter installed. Be prepared when the secondaries open. I tuned a buddies 6 pack RB car. His secondaries were not working correctly and his timing was way off. I had assumed he knew how to drive, but the Doctor Jekyl & Mr Hyde nature of the outboards kicking in can be stunning with this induction set-up. The vacuum secondaries almost feel like they have a mind of their own compared to the mechanical secondary carbs. I never liked the vacuum carbs for that reason. He completely wrecked the car some days later when he was at full throttle in 2nd and the rear tires broke loose. He panicked and it fishtailed out of control. Broke his daughter's arm in the crash too. 1970 Plymouth 'Cuda #'s 440-6(block in storage)currently 493" 6 pack, Shaker, 5 speed Passon, 4.10's 1968 Plymouth Barracuda Convertible 408 Magnum EFI with 4 speed automatic overdrive, 3800 stall lock-up converter and 4.30's (closest thing to an automatic 5 speed going)

Re: Steps to Convert a 1970 440 4bbl to a Six Pack Setup [Re: Rob440Magnum] #2755902 03/25/20 04:09 PM 03/25/20 04:09 PM
Joined: Aug 2003 Posts: 43,228 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 43,228 Bend,OR USA	Originally Posted by Rob440Magnum According to Jim Schild's book, in 1970 the center carb was different depending if you had an automatic or 4 speed tranny. R4375A - 4 speed carb R4376A - automatic carb R4383A - rear carb R4382A - front carb What was the difference on the center carbs? What exactly is holley reproducing today for the 440 six pack setup? My Challenger that I will be installing this on is a 4 speed car. Thanks, Rob Holley made more than those two List # for both 1970 CA and non CA six pack cars, according to Holley master parts catalog I remember seeing 3 or 4 more center carb List #s. Dang the EPA anyways Mopar had Holley reproduce the 1971 non CA automatic six pack carbs is what I remember now They will have a -1 after the List number on those later carbs Last edited by Cab_Burge; 03/25/20 04:31 PM. Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

Re: Steps to Convert a 1970 440 4bbl to a Six Pack Setu [Re: 70-AAR-Cuda] #2756071 03/26/20 12:20 AM 03/26/20 12:20 AM
Joined: Jun 2006 Posts: 5,163 CT GTX MATT master
GTX MATT master Joined: Jun 2006 Posts: 5,163 CT	Originally Posted by 70-AAR-Cuda Outstanding write up on the sixpak setup..... reminds me of the good old days... The original post is from the good old days Now I need to pin those needles, got to feel that heat Hear my motor screamin while I'm tearin up the street

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