Thread: which Cam

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Originally Posted by willyFJones

I just bought a mark IV 454 with 62k miles on it im droppin it into my 87 monte carlo ss i dont have much knowledge of this motor just need some input on what cam an carb , distributor, an all to upgrade to the motors bone stock right now

mark IV or VI built many of both if bone stock engine the VI 454 /gen 6 is a step nose cam core and a roller cam engine but not to much cam in all stock form on either engine years . if the heads have rotators under the valve springs some heads only ex new or truck head both intake and ex side ? do you know ? valve guides may have to be cut down for most all valve seals if still stock for more lift . less your head have had guides cut down for pc seal or use the marine / old l88 snap sheilds in under the steel valves spring retainers going past 500to 544 lift or with stock parts rocker arms and valve springs going to be very close with a bone stock heads with more lift heads will need a going threw at the lest to check valve springs and coil bind valve seal room to guide and retainers to seal and you still should check piston to valve under 500 lift you should be ok but check it anyways i do . the heads on a mild build put rotator elimintors as this lets you use a better valve spring but i left them in place on some builds but not many . so for a mild to bone stock older low HP . low cr smog engine i like the marine cam it works it fits many cam companys make copys of them and have a spin on this cam as there copy of it with knowing much of what you have this cam works good it cams from 510/510 213/213@050 lc113 or the marine cam 500/500 050@222/222 lc114 there is better cams that may fit you need but the two cams are just about a drop ins