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Engine code/casting numbers for Vortec vs non?

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  • Engine code/casting numbers for Vortec vs non?

    My boat originally had a 1994 2 barrel non-vortec engine installed. A few years ago the previous owner sucked some seaweed around the water intake and overheated/ruined the engine. They had a Jasper rebuild installed, which I believe they bought as a short block and installed the original manifolds, intake, carb, etc. I'm considering a 4 barrel conversion, but I would like to know if there is a way to tell by a casting number or something on the block/heads that would indicate what was installed.I'm hoping the rebuild was a newer setup which would have had the vortec heads installed so I could make the most of a 4 Barrel swap.

  • #2
    the heads are what make it a vortec or non-vortec

    if you have 12 intake bolts, you have a non-vortec headed motor
    if you have 8 intake bolts (2 in each corner) you have a vortec headed motor

    if you have a non-vortec and want vortec heads, simply swap the heads
    Cheesehead boating the Gulf Coast of FLA 27.51° N, 82.53° W

    1988 Cruisers Rogue 2420 -VP 290 DP now powered by custom 468 - https://forums.iboats.com/forum/owner...988-rogue-2420

    Past Boats
    1970 Wooster Hellion - Merc 9.8
    2002 SeaRay 190BR - 5.0 - A1G2 - "Cheeseheads in Paradise"
    1984 Avanti 170DLI -3.0 stringer- "Ship Happens"

    What’s behind you doesn’t matter.Enzo Ferrari

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    • #3
      Originally posted by bashr52 View Post
      My boat originally had a 1994 2 barrel non-vortec engine installed. A few years ago the previous owner sucked some seaweed around the water intake and overheated/ruined the engine. They had a Jasper rebuild installed, which I believe they bought as a short block and installed the original manifolds, intake, carb, etc. I'm considering a 4 barrel conversion, but I would like to know if there is a way to tell by a casting number or something on the block/heads that would indicate what was installed.I'm hoping the rebuild was a newer setup which would have had the vortec heads installed so I could make the most of a 4 Barrel swap.
      If motor is salt water cooled, buy a new motor or find a junk yard 350 and build one from scratch. Too much cancer that you can't see. If you have thunderbolt ignition sytem with knock sensor, I'd build a stroker with high-rise and Eldelbrock 4 barrel. You can easily get 100+ more hp out of them.

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      • #4
        Originally posted by Scott Danforth View Post
        the heads are what make it a vortec or non-vortec

        if you have 12 intake bolts, you have a non-vortec headed motor
        if you have 8 intake bolts (2 in each corner) you have a vortec headed motor

        if you have a non-vortec and want vortec heads, simply swap the heads
        Thanks Scott. This is exactly what I needed. Not worth doing if I have to swap the heads, if worth doing at all for the cost vs gains. May just rebuild the 2 barrel and call it good.

        Boat has always been freshwater kept, except for the last year since I have moved to VA and used it a few times a year in the bay.

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        • #5
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          I did a vortec head swap (with porting, port matching, etc), cam swap, roller rockers, and a carb spacer on my 1988 V8 and it woke it up significantly. if you search around, your into a set of vortec heads, a 4-barrel intake and carb for about $1000
          Cheesehead boating the Gulf Coast of FLA 27.51° N, 82.53° W

          1988 Cruisers Rogue 2420 -VP 290 DP now powered by custom 468 - https://forums.iboats.com/forum/owner...988-rogue-2420

          Past Boats
          1970 Wooster Hellion - Merc 9.8
          2002 SeaRay 190BR - 5.0 - A1G2 - "Cheeseheads in Paradise"
          1984 Avanti 170DLI -3.0 stringer- "Ship Happens"

          What’s behind you doesn’t matter.Enzo Ferrari

          Comment

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