MSO documentation

[PhilS]

Thanks for the help guys but I'm curious about this formula. More than one displacement can have the same bore so I'm not sure how it works. Does the SAE number apply to more than one engine size? Also when I ran through the numbers I wasn't getting a match to the MSOs I've seen. I'm assuming that the number actually has relevance but maybe not.

[Belair62]

Phil my Y Camaro MSO states 53.6

[Mr70]

When I did a VIN search in 1995 on my car,the Missouri DMV sent me pages of 1970 Chevelle VIN's that were numbered around my cars VIN#.(They were pretty loose back then)
I was able to ID a few of the cars to their current owners today.
As was mentioned earlier,there were human errors when reporting these numbers,but they show my L-78 Chevelle as 51 taxable HP,an L-34 Chevelle as 48 taxable HP,and an LS-6 Chevelle as 54 taxable HP.

[mchriscad]

This is very interesting. I have to admit I have never heard about this. I dug out the copy of my MSO on my 67 Vette L89 and it says 57.8. Thoughts?

[PhilS]

Multiplying by 8 would give you 462.4 hp. I think this would be pretty close to correct for a blueprinted engine. Years ago a friend who had held some national records with small block Chevys told me that a blueprinted 302 would make about 380 hp. I think the MSO rating on Zs is 48. That comes to 384 hp. I looked at a bunch of new MSOs at a friends GM dealership recently and the nembers seemed pretty consistent. I'm certainly not sure of anything about this and that is why I'm seeking more info but if it is valid then it might provide another way to document cars without other paperwork. It seems that there might be too many inconsistencies though. More investigation needed. I'd like to see an MSO for an L-72 Vette.

[GeorgeLyons]

The yellow COPO was mine, yes the SAE HP was 55.0. While in Phoenix I saw one of the other Westminster Chevrolet COPO Chevelles, Red 4spd (Was spec paint, Buick Riviera Gold), now owned by Tommie Lee Austin. It too had an MSO copy showing 55.0. Interesting sidenote: Tommiie has a letter from the orig owner of his car talking about a friend of his buying a new Yellow Automatic 427 Chevelle from Westminster.........that would be my Yellow car. Pretty cool, huh ?

[PhilS]

I've recently found 57.8 hp on a 71 Hemi Challenger title. I'm still looking for more info on some of the low hp big block cars. I'd really like to know if all 396s are 53.6 or just the l78s, Same question for the 427s. At least the l72s and l89s are different. Anybody?

[Enoch]

Just wondering which 67 L-89 you have. I know of the blue AIR coupe, yellow coupe, green coupe maroon vert, silver vert. So there a 11 I don't know of is yours one of those or another. What other paper work do you have for it?
Those cars are super .
Thanks, Rich.

[mchriscad]

My car is Black with a Red stinger and black interior. I have the original tank sheet, copy of the MSO, dealer order sheet, NICB owner history report (this is where the MSO copy came from) Thanks, Chris

[Enoch]

WOW, thats the first I heard of a black-black 67 L-89. I'd love to hear more about the car!!! IE: options, how long you had it, previous owners. You can PM me if you wish not to put that out on the web. You are a lucky man to have one of those.
Rich.