Swap in a 350 4bb or keep the 300?

Discussion in 'Small Block Tech' started by mygrain, Dec 27, 2002.

  1. painekiller

    painekiller Well-Known Member

    mygrain, i have a complete running rebuilt 68' GS 350 motor "PP" code. it is advertised at 10.25:1 comp. im not sure what all is done to the motor as it was rebuilt before i got it. the only miles it has on it are from driving it from nevada to ohio. seems to have a little cam in it,stock 4 bbl intake and orig q-jet,cast iron exhaust.runs good.also have a rebuilt th 350. doug
     
  2. 350Regal

    350Regal Member

    Got Me Worried

    I'm just finishing up my 70,350 4bbl swap in my 85 regal. I didn't do much to the Eng. sense it was running when I got it. I replaced all gaskets besides the head gaskets. Also I had to replace the whole front cover because of cracks in it (mostlikey due to someone replacing the rope seal). I went ahead and put new water pump, fuel pump, and alt. I didn't have to change out trans. or and thing like that. My regal was a small V6 don't know what size, but how much of a ping will I have and what can I do to stop it. All I have left to do is figure out all these vac. line in and out of the carb. I know now when it's running I have a decent amount of smoke coming out, but no pings yet. I'm running BP Super 93 with NOS 0 to 60 oct. booster. Will this be enough or will I have to go racing fuel to? If so where's a place to get it????:Dou:
     
  3. YellowLark

    YellowLark Well-Known Member

    If you can't hear significant pinging during acceleration, then you don't have to worry about it.
     

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