Okay, like I said I have 2 engines. The one for sure is a 77 block which is in the car. my spare thought it was a 76 ran the numbers to the chart, found the number just above the water pump, #395558 2 and the heads are #8 SWTF??? Any ideas guys

 

If the heads are original it could be any year from a 1973-76ish? You need to check the vin number stamped in it. The first digit will be a 3 for Oldsmobile, the second will be the year of the car it came in. 3=1973, 4=1974, etc. If your not sure where the vin is stamped check this thread:

https://classicoldsmobile.com/forums...s-engines.html

John

 

Okay went and looked #36M171518 and on the intake manifold #411990

 

So it's a 1976 motor, which is consistent with the block casting no. and the #8 heads. Why so confused?

 

Yeah, rebuild with flat tops, deck .015, use a .028 gasket, you end up at 9.2 to 1 +/-, perfect for a street engine.

 

[QUOTE=2blu442;240408]If the heads are original it could be any year from a 1973-76ish? You need to check the vin number stamped in it. The first digit will be a 3 for Oldsmobile, the second will be the year of the car it came in. 3=1973, 4=1974, etc. If your not sure where the vin is stamped check this thread:

https://classicoldsmobile.com/forums...s-engines.html

John[/QUOTE

at first I had thought it was a 76 block,got the numbers from the block, looked on line most places said it was around 70'ish block.Thats why I was a little. Ran the second set of numbers you told me and that makes more sense. THANKS

 

Where would the CR sit if the deck was at zero?

 

You probably don't want to have only a .028 gasket with a zero deck. That's getting a little tight.

 

I assume too much, my bad. The reason for cutting .015 and using a .028 gasket is to keep the price down. Speed Pros generally sit .025 +/- down, so, cutting .015 off the deck that makes it .010 down plus the .028 gasket gives you optimum piston to head, right around .040. You could zero deck and use a .040 gasket, but that is just an extra cut of the top of the block.

Here is a calculator, start using it,
http://www.angelfire.com/fl/procrastination/motor.html

 

I would but I don't know any measurements of my engine, even for me to rebuild an engine to this much power is to much for me.all I've done was stock with an rv cam.

 

I will leave the engine in your hands. You build, I will enjoy.