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Old 07-24-2006, 12:10 PM
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351w swap

How much trouble will i have if it can be done to put a 351w sold tappet cam 351 from a 74 t bird to my 94 f150 with roller cam. will heads and all work or will I have to use the early model heads?

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Old 07-24-2006, 12:24 PM
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Quote:
Originally Posted by dptyscott
How much trouble will i have if it can be done to put a 351w sold tappet cam 351 from a 74 t bird to my 94 f150 with roller cam. will heads and all work or will I have to use the early model heads?
If you have a solid tappet cam in a 74 it is not factory. But maybe you mean flat tappet hydraulic? So I'm only guessing.

You will probably need special length pushrods for the late heads on an early block.
You cannot reuse 94 headbolts.
There is a minor variation in intake gasket matchup, watch those water ports.

The 74 head has better intake ports than the 94. Unless you are into power, it probably will go unnoticed.
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Old 07-24-2006, 12:43 PM
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so maybe stay with the older heads and thr efi should work. your right about the cam.
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Old 07-24-2006, 12:52 PM
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If you have a running W that you want, drop it in there and use the 94 FI stuff.

Are you sure the 94 is a roller cam engine? I don't think that it is.

If that 74 is stock, it has a horrible small cam in it that is retarded 8*. At least it needs a 70-71 timing gear in it to bring it back to 0*.
This would be a good time for any cam upgrade, even a Summit RV cam would be good.
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Old 07-24-2006, 01:51 PM
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my old friend steve is a cam grinder at lazer here in memphis in fact thats where the motor is and has been sitting on the floor for ten years. so that said i am sure your right and i will need him to grind one for it. and a total going through of the motor is in store. I just hope it will go in the truck when its all said and done without having to change the intake and all the scavengers[ac/ps ext.]. What years blocks would be a identical match?

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Old 07-25-2006, 08:07 AM
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what years would be a identical match for this 94 351w.
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Old 07-30-2006, 08:16 PM
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I am not sure what you are getting at here.
Just buy a complete cam/valve train assembly from CompCams and don't mess with re-grinding anything.

If you have to rebuild the engine anyway, I would stick to the 5.8.

If you are going to a carburetor, you are messing up, IMO. You'll drop 5 mpg instantly, period.
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Old 07-31-2006, 07:52 AM
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not switching to carb. I have now decided to rebuild the original motor. It will be bored and have the new valve train.
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