Is it standard procedure for the shop that puts together your 383 to put new cam bearings in for you? If not how much do they cost? And while I'm asking, how much is typical block work and assembly of a 383 shortblock?

 

Ideally they should install new cam bearings. How much for machine work will depend on what needs to be done to the block. Generally clearancing for the longer stroke isn't a big deal since it only requires an hour or two with an air grinder and a few touch ups when the motor is assembled. As for assembly, most shops charge a standard fee for their motors. My builder for instance charges $1000 to assemble a motor, but he also provides a guarantee.

 

I am not generally one to say something is "too expensive" as I have no problem paying well for good work. But $1,000 is way high for just bolting it together. Now, if that $1,000 include all the "small" parts needed for assembly like gaskets, fluids, hoses, assorted fasteners it would be more understandable, but it still high. That "small" stuff runs $200-300. Still, I am not being critical - if you are happy with it that all that counts.

Anyway, deciding on replacing cam bearing depends on the history of the motor and on inspecting them. If the car had a low oil pressure problem before the rebuild, just replace them. If the mains went due to inadequate lubrication, contamination of the oil system, etc. then assume the cam bearings are bad too, and replace them. Ditto if the motor has big mileage. Otherwise, do a visual inspection. Then check the journal to bearing clearance. A common upper limit for clearance is .006 in., which can be checked with a mic on the cam journal and a telescoping gauge in the bearing. While you're there, make sure the oil holes in the bearings line up with those in the block. If there is any doubt, they should be replaced.

But to answer your question, it will depend on the shop. If you want it done a certain way, talk to them about it. Replacement will add ~$100 to the cost of the rebuild.

Rich

 

Thanks. I am still a little unclear though on the price. Is $1000 high for the assembly of the shortblock only, or for both machining of the block and assembly together? From previous posts, I was under the impression that the average total for machining and assembly was ~$1500. Supposing you just went with 2 bolt mains, and the most standard 383 build, with new cam bearings, what would be an acceptable price range for the whole deal (rotating assembly not included)?

 

I misunderstood and though you were referring just to assembly. Depending on exactly what is involved and included, if the $1,000 includes the machine work it is very reasonable. If the work is of good quality, go for it. If you trust the machine shop (and don't use them if you don't), let them decide about the cam bearings. Tell them to inspect them and replace them if needed.

Rich

 

Okay, so I should pay no more than about $1300 for a shop to build my 383, no 4-bolts. As long as I can find a good shop, this promises to be a great deal cheaper than the $4500 CMotorsports and Scoggin-Dickey charge for their shortblocks. Although, I could not put down the peace of mind and lack of hassle one would have buying from either of those places.

 

I should clarify, the $1k includes the bore/hone, cam bearings, freeze plugs, cleaning, and assembly. Pretty much the machine work needed to get everything right, extra stuff like splayed main caps and align boring are extra. Sorry about that.