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Thread: 1985 CV, from stock cam to mustang HO cam, and upgrade problems?

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    Member magnus77's Avatar
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    Default 1985 CV, from stock cam to mustang HO cam, and upgrade problems?

    Hey guys,

    I have a 1985 crown victoria, 5.0L 302 that I'm planning on tweaking a bit. I plan on finding some cheap heads gt40 or gt40p (and associated headers) eventually and was wondering if I can swap a 1988 HO stock mustang cam in it. I realize I would probably need link bar roller lifters becuase I dont think it's a roller block, but would I need to change the firing order to match the 88' HO cam, and would it affect anything? I plan on switching to a better weiand intake, and to a 4v carb as well.
    Keeping it for a daily, not strip car. The car has 65k miles, no A/C.

    Basically going to be getting while staying on budget:
    1)better heads
    2)stock HO cam????
    3)weiand intake
    4)4V carb
    5)headers

    Thanks,
    Attached Thumbnails Attached Thumbnails crownvic.jpg  

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    GMN = life pantera77's Avatar
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    If you plan on doing any performance mods, your gonna have to ditch the CFI, but it sounds like you have that covered. Your correct, an 85 should be flat tappet. Yes, the cam dictates the firing order.
    Are you opposed to an engine swap? A JY explorer long block would be a much better foundation.

    Honestly, before any of that though, I'd do gears, and beef up the stock AOD, those early ones are pretty weak.
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    Member magnus77's Avatar
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    Quote Originally Posted by pantera77 View Post
    If you plan on doing any performance mods, your gonna have to ditch the CFI, but it sounds like you have that covered. Your correct, an 85 should be flat tappet. Yes, the cam dictates the firing order.
    Are you opposed to an engine swap? A JY explorer long block would be a much better foundation.

    Honestly, before any of that though, I'd do gears, and beef up the stock AOD, those early ones are pretty weak.
    Its a 2V carb and cast iron intake currently. I guess some 85' models were carbed.
    What do you imply when you mean beefing up the stock AOD, like torque converter or something? And yea for sure, itleats 3.55 or even 3.73, but I'd like to itleats keep some mileage.

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    GMN = life pantera77's Avatar
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    Is it a Canadian model?

    3.55 or 3.73's are both good choices IMO.

    Bare minimum a shift kit, higher stall convertor and if you run the HO cam (or similar), you'll need a HO governor.
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    Member magnus77's Avatar
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    Quote Originally Posted by pantera77 View Post
    Is it a Canadian model?

    3.55 or 3.73's are both good choices IMO.

    Bare minimum a shift kit, higher stall convertor and if you run the HO cam (or similar), you'll need a HO governor.
    Yes I believe it is a canadian model.

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    If doing link bar lifters you might as well throw a small used cam in it lol..............flip side is you could do a nice hyd. flat tappet for less money bbbuuttt i'm definitely a fan of going roller.........pantera hit the nail on the head with the explorer swap from a cost perspective....you could get the motor for nearly what the cheapest lifters cost new..........an A servo or equivalent is a worthwhile AOD upgrade also.........

    Great looking car BTW


    P.S. Dont forget to upgrade the dizzy gear....dont wanna chew it up with the roller cam.........
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    Member magnus77's Avatar
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    Quote Originally Posted by Mr.Blue View Post
    If doing link bar lifters you might as well throw a small used cam in it lol..............flip side is you could do a nice hyd. flat tappet for less money bbbuuttt i'm definitely a fan of going roller.........pantera hit the nail on the head with the explorer swap from a cost perspective....you could get the motor for nearly what the cheapest lifters cost new..........an A servo or equivalent is a worthwhile AOD upgrade also.........

    Great looking car BTW


    P.S. Dont forget to upgrade the dizzy gear....dont wanna chew it up with the roller cam.........
    Im actually considering buying an upgraded intake, to a 4V carb (2v carbs are brutal..), headers just to get the most out of it currently (and get rid of smog pump), new gears, then eventually down the road maybe find a explorer long block and throw a HO mustang cam in there. Relatively cheap and I can spread it out over time, & throw the parts on that. Regardless of heads/cam, I still think its getting choked with those cast iron boat anchors they call manifolds.

    The engine is so low miles that I don't want to swap it right now.
    IF ANYTHING, I could throw a better flat tappet cam in possibly....Still not for a while though.

  8. #8
    I'm an air-conditioned gypsy gadget73's Avatar
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    Some 1985 blocks are roller capable if you install the hardware from a later motor. Some are not. You'd have to pop the intake off to see, or you'll have to find the block casting number to look it up. I think its over on the side by the starter, and the roller capable block is likely an E5 or E6 part number. If its an E2 or E3, that will be a flat tappet cam only block. If there are raised bosses in the middle of the lifter galley that look like a bolt ought to go in there, you have a roller compatible block. I think you will need to drill and tap the holes, but that should be no big issue.

    If its not roller compatible, I'd swap the whole motor. Link bar lifters will work, but a set will cost more than the shortblock is worth. Those had crappy pistons and none of the rest of it is special either. For all the bother and expense of converting it, you can just swap it to a later block that has better pistons. If you're looking to upgrade the heads anyway, dropping a complete Explorer motor in there is definitely the way to go.

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