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Pontiac of the Month

Jack Leslie's 1957 Sedan Delivery

2024 April
of the Month

1980Ttops

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Posts posted by 1980Ttops

  1. Is the carb that's on it a dual jet? If it is, that funky spacer/adapter is still on a 2 barrel intake. Not sure what the purpose was for doing this instead of just having a normal 2 barrel carb on it. If it is a 4 barrel intake with a 2 barrel adapter then that saves you the hassle of finding a 301 4 barrel intake. The 4 barrel doesn't make a big difference performance wise. On my 77 Grand Prix 2 1/4 dual exhaust and rear gears made a bigger difference. 

  2. Looking for advice on intake & carb options.

    The car is a 1980 Trans Am, 3.23 posi, 400 TH, shift kit, 2200-2500 converter. New front and rear suspension, all stock with polyurethane bushings. Hooker Super comp 1 7/8 primary tubes, 3" pipes with X pipe, jegs mufflers. Frames tied, A/C deleted.            The ENGINE is a pontiac 400, flat top 4 valve relief pistons (8cc), m54s oil pump with hardened shaft, Lunati bracket master 2 cam - advertised 292* duration - .490 lift - 110 LSA matching lifters, comp push rods, 9 keyway summit double roller chain & gear, baffled oil pan - no Windage tray, Summit distributor with adjustable advance and recurve kit - used 1 light & 1 medium spring. Be Cool radiator and 160* thermostat, Flow Kooler water pump, SS backing plate - massaged to tighten gap to impeller. Gonna use Evans waterless coolant.                          HEADS #13, hardened valve seats, SS Ferrea valves, 3 angle valve job, mild port work, gasket matched, push rod holes elongated, new guide plates, Lunati springs. 

    Intake & carb choices (Parts that I have) INTAKES -  iron intakes with & without EGR, 71 aluminum 455 HO (no heat crossover), Performer, Torker 2, Hurricane (chinese). CARBS - Edelbrock 600 & 750, Carter 650, Holley 750 DP, a dozen qjets. SPACERS 1/2" and 1" for square & spreadbore. I will be separating coolant crossover on whichever intake I use for no mess intake swaps. My question is best intake & carb combo for my car, my head says a Performer RPM. If I can get similar performance with combination of the parts I have that would be great. Been a long journey building my car, so close to being able to drive it now. Long post, I wanted to include all info so I can get the best answers. Input & suggestions are greatly appreciated. 

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