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GMC V6 and V12 Engines Engine repair and rebuilding

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  #21  
Old January 27th, 2023, 01:43 PM
tbucketnut tbucketnut is offline
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Default Re: It's at the Machine Shop

Great to hear, I just finished my 305 and have somethings left from my rebuild.
Machined crank and set of .020/.020 main and rod bearings. Found out my engine was a 1974 305 and took a different main bearing (bigger), so the main bearings are for 60-73 motors.

Good luck with the rebuild. Dont forget to replace the oil pump, I found out there are two different ones too based on the size of the oil mounting bolt. They are NOT interchangeable.
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Steve Stock
Gig Harbor, Wa

1953 Chevrolet 3100
261 cu inch, SM420
Finished Cab off restoration

1964 GMC 1000
305 V6, SM 420
Restoration is now started, still looking for an oldsmobile style power steering pump
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  #22  
Old January 27th, 2023, 06:49 PM
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Walys60 Walys60 is offline
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Default Re: It's at the Machine Shop

Quote:
Originally Posted by tbucketnut View Post
Great to here, I just finished my 305 and have somethings left from my rebuild.
Machined crank and set of .020/.020 main and rod bearings. Found out my engine was a 1974 305 and took a different main bearing (bigger), so the main bearings are for 60-73 motors.

Good luck with the rebuild. Dont forget to replace the oil pump, I found out there are two different ones to based on the size of the oil mounting bolt. They are NOT interchangeable.
Thanks tbucket! I will PM you about your left overs . I am going to pass it on to my brother so he can tell me what exactly we are going to need first but I'll hit you up.

I definitely have the oil pump on my list since that was the one thing I was worried about before. Thanks for the heads up, I will get the specs off the original to verify.
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