NW Machine Shops for rebuilding engine - Impala Tech
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post #1 of 4 (permalink) Old 12-26-2016, 03:11 PM Thread Starter
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Join Date: Aug 2011
Location: Western Washington
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NW Machine Shops for rebuilding engine

Merry Christmas everyone,

Im nearing the point in restoration to have my Impala's 327 engine rebuilt. Nothing major in the way of modifying, keeping numbers so not looking to replace with new units.

Ive heard of a few places in the area like Britco in Centralia and Block & Head Machine in Tukwila.

Has anyone heard good or bad about these folks or recommend someone else?


Frame up restoration of 1967 Impala in progress

Last edited by RO_Impala67; 12-26-2016 at 10:03 PM.
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post #2 of 4 (permalink) Old 12-26-2016, 09:57 PM
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I used to build engines to pay for my racing addiction. One of the reasons I gave that line of work up was the fact that GMPP (General Motors Performance Parts division) was eating my shorts on builds. Chevy could sell you a factory warranted engine for less than I could buy the parts at wholesale and then have machine work done to used parts. Chevy could grant a factory warranty because it was a brand new engine built with new parts on an engine stand the same way I did it (only "Hecho en Mexico" to save on labor).

Let me elaborate on the difference between a factory warranty and an insurance policy as offered by some reputable engine builders. A factory warranty means if it breaks in the first year you tow it to any GM dealership and they will install you a brand new engine in your car, within hours or at most a day or two of dropping the vehicle off. It doesn't cost you a dime other than for the wrecker. With the insurance policy you pay up front for the repair of your motor with the cost to you dependent upon where you have the work done. You then file a claim against the policy with the insurance company and hope that they will pay most of it. Being as how insurance companies hate to pay out they will look for ways to weasel out of the claim or offer you a reduced payment in the hopes that you will settle.

Just because I said that a GMPP motor was built cheaper than I can build one and turn a profit doesn't mean that they are cheap. A 383 short block will run you $3,500 for a forged crank with four bolt mains in the bottom end. This allows you to keep your old heads and intake to retain the appearance of your original engine.

Chevrolet Performance 19332527: 383 Short Block Assembly Cast Iron Block | JEGS

Or you can buy a ZZ5 350 short block for $2,500:


If you do not mind center bolt valve covers, a brand new complete 350 cranking out 400 horsepower in a ZZ5 Fast Burn aluminum headed Vortec engine runs you $6,500.

Chevrolet Performance 19301294 ZZ5 Turn-Key Crate Engine

Cast iron heads drops the price and Chevy makes four different versions of the 350 differing in the parts they are screwed together with.

If you want a tamer 350 you can buy a stone stock brand new warranted GMPP engine as found in pick-ups and full size cars for $1,550 that will still make more torque (304 ft/lbs.) and horsepower (250 horse) than your base 327 engine that you can keep to sell with the car in the future. The all new engine is designed to run on pump gas regular which your current 327 isn't (even if it was the base 250 horse it requires regular leaded gas that had an octane rating of 96).


These new engines also don't leak oil the way the old ones did which is why they have the center bolt valve covers, instead of perimeter bolts that are usually over tightened bending the tin which causes the leaking.

Big Dave
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post #3 of 4 (permalink) Old 01-07-2017, 11:37 PM Thread Starter
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Thanks Dave for that very informative data but Im wanting to keep numbers matching as much as possible.
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post #4 of 4 (permalink) Old 01-08-2017, 06:53 PM
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Originally Posted by RO_Impala67 View Post
Thanks Dave for that very informative data but Im wanting to keep numbers matching as much as possible.
I agree pull the motor and trans drain the fluid and store it under your work bench in a plastic bag that is water tight. You can then go out and buy a GMPP crate, engine paint it orange, and drive your car without a worry about blowing up your numbers matching engine. The only time any one other than you is interested in a numbers matching car is at a very strict juried whit glove inspection car show or when you are selling it. Having the original motor in a bag and a motor that you can hammer on is a plus for a buyer. If they want the original motor under the hood and running you can put it back and keep the GMMP crate motor for your next project or sell it as 350 engines are getting scarce in bone yards (the last one made left the showroom in 2004, with the LX-x replacing it in cars over twenty seven years ago).

Big Dave
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