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Piston “Zero Deck Height” for big blocks (not RBs) would be 1.932”. I was curious about the positive deck height on 1968 383 HP (road runner) engines. I own one and a 1969. But, have not had the ’68 apart. I have 906 heads and standard size 383 pistons. The standard size 383 pistons do not fit...

OK, that sounds more like the spring collar inside the crank seal. Your new crank seal should have one inside. If not, then the seal design doesn't need one? In other words it is part of the crank seal as far as I know. I'd have to look at one again to refresh my memory.

I'm pretty sure what you are describing is an oil slinger. If so, yes it should go back on the crank.

Can a 400 cast crank be neutral balanced by reducing the bob weight? In other words, Can the external balance (cast crank vibration dampener and torque converter weights) weights be eliminated by using lighter pistons, pins, rods, etc. to bring it to neutral balance? If so, what is the bob...

The 400 crank will fit mechanically into a 383 no problem. Same dimensions. However, the 400 crank is probably cast and therefore externally balanced. The 383 is probably a forged crank and internally balanced. The cast and forged cranks use different harmonic balancers and the torque...

From what I’ve read (I’m no expert) it is important to match the roof and side walls for max flow. Leaving the floor mismatched with a short curb actually increases fuel distribution because of the turbulence it creates. The mismatched floor decreases flow but improves the mixture inducted into...

You should be OK I have the same heads. I just put steel head gaskets on my 400 and thought the same thing. They do not over heat and match the gaskets I removed. You should be OK. Here's mine:

The Accurate Exhaust Products (PN CBS6869ET) are $730.00 and are not stainless either. There info is more detailed about what you get and possible better quality than Year One. Still the TTi looks to be the best value. Thanks for posting. John

Thanks for posting and the info. I went to the “Pypes” web site and it looks like they only have “X” pipes from the cross member back and is $414.65 without mufflers. Do they sell a complete “stock” system from the cast iron exhaust manifolds to exhaust tips? The Year One 2-1/4” exhaust (PN...

I’m running the stock cast iron intake manifold and will be running the stock cast iron exhaust manifolds. I currently have a Norris hydraulic cam with a lot of duration. It sounded great with the headers and made plenty of power. Torque and drivability were not much of a problem since I was...

I have a ‘68rr 383 4sp. I was leaning toward the TTi exhaust system from the exhaust manifolds back. I know the Year One system is 2-1/4” pipes and the TTi is 2-1/2” pipes. I have the original exhaust tips. I’m not sure if my tips will work with the TTi system. The Year One description says...

Thanks for this information. It sounds like the cam itself has not changed. If that info is correct (link), it is very informative, and it is what I was thinking (a re-release of the same part basically). When I did a search here on ForBBodies Mebsuta posts were the only ones that came up. Does...

I’m looking for the original cam for a 1968rr 383 4sp. So, I’minterested in the MP P4452783AE cam. It’s advertised the same way as theP4452783 cam was (“Identical to original”) and has the same advertised specs. Doesanyone know what year the AE was added to the part number and what it means...