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  1. #1
    Registered
    My Boats:
    87 Baja 240 sport
    Join Date
    Aug 2013
    Posts
    6

    454 Vortec Spark plugs

    I have a 454 GM motor in my boat. block casting number 10237297 which comes up as a vortech motor. I assume that the heads would be Vortech heads, which then would take a longer spark plug. I have been running the Delco MR 43 TS, . But seem to be running really cool at idle. Just wanted to make sure i put in the right plugs, so not to damage the pistons. Serial number of the motor 12568777. Thanks. Dan

  2. #2
    Registered
    My Boats:
    92 Baja 38 Special
    Join Date
    May 2012
    Location
    SD-KS
    Posts
    282
    They are a pretty good plug and should be fine for a BBC. I run Autolite APP25 I all my big blocks and they don't do that. If you want one up on that, just go to a XP25

  3. #3
    Registered
    My Boats:
    87 Baja 240 sport
    Join Date
    Aug 2013
    Posts
    6
    Thanks, I was thinking of putting in Delco MR 43LTS. But wanted to make sure not to hit the piston.

  4. #4
    Registered
    My Boats:
    checkmate 251 convincor,checkmate 253 convincor, 50 gibson
    Join Date
    Nov 2005
    Location
    Fredericksburg, Va
    Posts
    3,168
    if thats the base oval port engine it does take the longer plugs

  5. #5
    Registered
    My Boats:
    87 Baja 240 sport
    Join Date
    Aug 2013
    Posts
    6
    Thanks, i do know it has rectangular port heads


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