Thread: 396 Block and a 454 Crank

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Just curious, why wouldn't you polish the ports? The number 5 journal on the cam has a groove in it, so I'm guessing the bearing doesn't have one? I suppose any aftermarket cam I get isn't going to have a groove

Originally Posted by Dieselholic92

Just curious, why wouldn't you polish the ports? The number 5 journal on the cam has a groove in it, so I'm guessing the bearing doesn't have one? I suppose any aftermarket cam I get isn't going to have a groove

polishing the ports is not going to do any thing . do you have any idea whats going on in the head ports . smooth intake ports do not help mix fuel . i can get more power out of a set of heads with 4to 5 angles on the seat and a full radius cutter on EX and some bowl profilers then some hand blending . then you are going to get playing around with the ports. cut out the short side radius of the heads you will have junk. the bbc ex side there is not much short side to screw with. do if you want knock your self out .if you never done set of heads you do not want to hit the seats or open this parts of the head up or you will have junk or the machine shop will have to put seats in the heads or sink the valves and thats not good . the heads really do not need alot of work to make good power there is some things that well help to a point then its better to look at some AFR s or Brodix Race Rites .or RHS . or Pro fillers .all are good heads but you have to watch port runner size on this build . small O port is all you need . the block it.s self #5 is not grooved like 67 till 89 so the cam needs the groove for upper oil that feeds the lifters and top end . your block would be 65to66 . the cam can be cut if the machine shop has a lathe or cam can be done at the company that you buy the cam from.your block has no dowel pins to line up the front timing cover and the block has a dist tower casted in the block as well. done many