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Discussion Starter · #1 ·
I have a 77 D100 that I know the engine has been changed in. Is there a code on the engine for the year and displacement? On the left side just below the head is stamped 10310701 but that don't sound like anything :help:
 

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Do It In A Van
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SMALLBLOCK

67-75 318 2536030
76-79 318 4006730
80-83 318 4104230

71-74 360 3418496
75 360 3870230
76-80 360 4006830


This assuming you have a smallblock. The casting numbers are on the right (passenger) side of the engine block right below the head....the casting number may actually end with the engine size (ie. 4006830-360)
 

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That's certainly possible.
 

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Discussion Starter · #5 ·
Folks I know I must be making this harder than it should be, but I've spent the last 30 yrs. working on Chevs so be easy with me. On the l.frt (drivers side) on a pad just below the head is stamped 10310701, on r.side is cast 10*10*77,on pad just above pan rail is stamped 8G176579,this is all I can find.HELP
 

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That engine was built October 10, 1977. So it's a 77 engine.

Okay try this...you might find casting number above/behind the starter.

4006730=318

4006830=360

Is the distributor in the back or front of the engine? If it's in the back, it's a smallblock (318 or 360), if it's in the front, then it's a bigblock (400, 440)
 

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Discussion Starter · #7 ·
Thanks Nate,I'll look over there for it.I know this is a small block I was just curious about yr. and ci.
 

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On the right side of the block it should show the date it was made, it will be right blow where the head meets the block, towards the rear, sort of over top of the oil filter. There is also a little clock-looking thing that shows what shift it was made on, although I'm not exactly sure how you are supposed to read it.

On the left side it will have the engine size stamped in as the last 3 digits of the casting number, behind and a little above the starter. You should be able to look in between the inner fender and the frame and see it. It may have one more number after the engine size.
 

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Discussion Starter · #9 ·
Thanks everybody,found it right over the starter.I can't believe somebody put a 77 engine in a 77 truck.
 

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How about that. So...what engine do you have? 318? 360?
 

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Discussion Starter · #11 ·
It's a 318 Nate,I was pretty sure it was, but I just had to know.Now I have a 225, a 318,two 360s,and a 440.Not a full house yet.
 

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Ohhhhh a 440....that would perfect in that truck :D
 

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Discussion Starter · #13 ·
This thing has still got the 6 cyl. springs in it,it sits so low you know what it would do with the 440. I've got to try to find some springs.
 

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Advance Auto Parts.

I looked up a '77 D200 w/440

TRW CS7170
 

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Discussion Starter · #15 ·
Thanks again Nate,never thought about looking on puter. From there listing they use the same springs on the 79 D200 360 ext.cab. Guess who has a slightly used low milage one sitting in the field? This may become a winter project.
 
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