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Old 05-08-2012, 07:30 PM
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SBC engine info needed

Hey guys...

I recently bought a '73 914 with a 350 conversion. I need to do some work on the car but really need to know what I'm working with before I go throwing money at parts. I have pulled the numbers I can see off the block/manifold, and this is what I have so far:

GM 5.71.0
F277
10248880

The manifold looks to be an Edelbrock Performer. I'm not sure which one though. The carb is a Holly 4 barrel. Again, unsure at this time.

I need to replace the clutch and would like to find out this engine's original application, HP rating, and ft lb torque.

Thanks in advance for any help.

Brian

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Old 05-08-2012, 07:39 PM
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try here.http://www.mortec.com/
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Old 05-09-2012, 03:20 AM
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Quote:
Originally Posted by Bmallett
Hey guys...

I recently bought a '73 914 with a 350 conversion. I need to do some work on the car but really need to know what I'm working with before I go throwing money at parts. I have pulled the numbers I can see off the block/manifold, and this is what I have so far:

GM 5.71.0
F277
10248880

The manifold looks to be an Edelbrock Performer. I'm not sure which one though. The carb is a Holly 4 barrel. Again, unsure at this time.

I need to replace the clutch and would like to find out this engine's original application, HP rating, and ft lb torque.

Thanks in advance for any help.

Brian
The "880" block (the last three digits are usually used when talking Chevy casting numbers ) is a hydraulic roller compatible block having the drilled and tapped bosses for the spider and cam thrust plate/retainer. This doesn't mean necessarily it'll have a hydraulic roller cam; flat tappet cams can also be used in this block.

It'll have a 1-piece rear main seal. There are '87-up blocks that have the full provisions for a mechanical fuel pump, but they're relatively rare. Your block probably will not have the mechanical fuel pump area finished so a mechanical pump can't be used as-is, although there are supposed to be 880 blocks that WILL accept a mechanical fuel pump- but I personally haven't come across one yet.

"F277" is a date code for June 27, '97.
"5.7" is usually followed by "L" (for liter), and "GAS" (for gasoline).

The Mortec link has been broken for a while now. An archived version is here.

The site I use most often is here, but they all have errors.

If the intake says only "Performer", it's a regular Performer intake. What you'd like to see is "RPM" with Performer.
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Old 05-09-2012, 11:21 PM
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Thanks for the info. I'll keep looking for the block sn. I think they're on the front side of the valve covers. That part of the engine is slammed against the firewall though. Maybe I can get a look with some mirrors.

What's the best way to find out about the cams? Open her up and look or are there other options to look for?

Hearing you refer to it as an 880 block explains why there is a large 880 on each side of the block.
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Old 05-10-2012, 02:42 AM
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Quote:
Originally Posted by Bmallett
Thanks for the info. I'll keep looking for the block sn. I think they're on the front side of the valve covers. That part of the engine is slammed against the firewall though. Maybe I can get a look with some mirrors.
The pad where the "suffix" will be found is on the passenger side if mounted in a domestic vehicle, right where the block and head meet. The image below shows a typical suffix code (code on the right ending in "CTG") along w/the partial VIN (seen on the left; the partial VIN may be missing from your block).

Click on the image for more info on Chevy engine codes. Here is a list of SBC suffix codes that's easy to use and has good coverage, although heavy truck/bus suffix codes are sometimes not archived.



Quote:
What's the best way to find out about the cams? Open her up and look or are there other options to look for?
One way is to pull a valve cover off, remove a pushrod and measure the length. If it has a factory hydraulic roller, the p-rod will measure about 7.2". If it has a flat tappet cam, the length will be about 7.8". You might be able to shine a light down along the side of a pushrod (w/o removing the p-rod) to see if there's a spider and dogbone roller lifter retainer (shown below). No retainer assembly = flat tappet cam and lifters.

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Old 05-10-2012, 06:37 PM
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Ok, so they are hydraulic. That I found out. I was also able to get to the pad on the passenger side to read some number. The problem is that they don't make any sense in regards to a partial vin or suffix. I cleaned the surface all the way down and read them via a mirrored scope. I triple checked myself. Here is all that was there:

7254

Prior to that it looked like either a CC or 00 or OO. But that was spaced away and set a bit higher than the numbers.

So it would be like 'CC 7254'.

????
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Old 05-11-2012, 01:17 AM
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Quote:
Originally Posted by Bmallett
Ok, so they are hydraulic. That I found out. I was also able to get to the pad on the passenger side to read some number. The problem is that they don't make any sense in regards to a partial vin or suffix. I cleaned the surface all the way down and read them via a mirrored scope. I triple checked myself. Here is all that was there:

7254

Prior to that it looked like either a CC or 00 or OO. But that was spaced away and set a bit higher than the numbers.

So it would be like 'CC 7254'.

????
"CE" is sometimes seen on replacement engines. It could be just a rebuilder in house ID number, for that matter (placed there after the original stampings were removed during milling the block decks). But you're correct in that it isn't a traditional VIN or suffix.

If the engine ever comes apart, be sure to measure the piston-to-deck height and make a note of it as well as the piston compression height. Those figures will tell you if and how much the decks were milled during a previous rebuild. This info will be useful when it comes time to compute the quench distance and compression ratio.
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