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Ever Heard of a 405?

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  • #16
    Is it a BOP TH400 or a Chevy TH400? I'd tell him $100. Keep the tranny if its a chevy one and put the motor on ebay, somebody will buy it. If the tranny is a chevy one its worth the $100 just for the case. IMO. BTW the difference I'm talking about is the bell housing bolt pattern in case you didn't know.

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    • #17
      ya 400's are getting hard to find now everyone snatches them up... id go for the tranny atleast..
      Originally posted by Frank The Tank
      Took the restrictor plate off to give the Red Dragon a little more juice. But it's not exactly street legal, so keep it on the down low.

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      • #18
        The 403's are a decent motor in the lower band. I guess the don't handle higher RPM's too well. It might be worth it to store it for like 5 years. At the moment 403's aren't in too big of a demand. Most put the Pontiac 400 in their bird. But the market is always changing so you never know.

        1978 Pontiac Firebird Formula W66
        350 Small Block Chevy Bored .030 Over (355)
        GM Performance Parts Vortec Heads
        Holley 650cfm Double Pumper
        Edelbrock Performer-Plus Cam
        Edelbrock Vortec Performer RPM
        Hedman Hedders 1-5/8" Long Tubes
        2-1/2" Exhaust With "H" Pipe & Hooker Aero Chamber Mufflers
        TH350 With B&M Transpak Shift Kit & 2400rpm Stall B&M Tork Master Converter

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        • #19
          yeah well the guy doesn't wanna buy my truck so i'm not gonna take the motor off his hands, besides it would just take up space, and i'm not sure if its a chevy or a BOP trans.

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          • #20
            GM never made a 405, it is probably a 305 , & you do not wantone of them, to small, if you are going ot swap get a 350 or 400 sbc. or an newer LT11 or LS1.
            a 400 small block would have to be bored out ot about 25 thousands, to be a 405 & no one would do that because you cant get that size pistons, unless you pay a boat load of money!

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            • #21
              Originally posted by bshaw
              GM never made a 405, it is probably a 305 , & you do not wantone of them, to small, if you are going ot swap get a 350 or 400 sbc. or an newer LT11 or LS1.
              a 400 small block would have to be bored out ot about 25 thousands, to be a 405 & no one would do that because you cant get that size pistons, unless you pay a boat load of money!

              umm he sold this car




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              • #22
                Originally posted by bshaw
                GM never made a 405, it is probably a 305 , & you do not wantone of them, to small, if you are going ot swap get a 350 or 400 sbc.
                Yeah... who uses those 305's anyways, psh... retards.

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                • #23
                  Originally posted by MattODoom
                  Yeah... who uses those 305's anyways, psh... retards.
                  Unless it has boost!
                  sigpic
                  Turbo Charged LS1/T56

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                  • #24
                    Originally posted by WMCCjames
                    Unless it has boost!
                    Or happens to be original restored.
                    sigpic

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                    • #25
                      Originally posted by WMCC85BERLI
                      Or happens to be original restored.
                      True...I awlays forget about you restored/original guys.
                      sigpic
                      Turbo Charged LS1/T56

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