Is there a way to find out what type of car did a 1969 350 rocket come out of? Trace the history not just what year. And what was the performance that it was putting out back then.
What car did my motor come from?
- Thread starter MWA
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69 oldsmobile 350 heads should have a #5 on the left side of the head next to the first spark plug hole, the casting number should be 397742
Best flowing small block heads out there, 64cc chambers with 9.5:1 compression.
I put a pair of street strip ported #5's on my 403 to increase the compression from 8:1 to 9.5:1.
Your motor most likely puts out 250hp as it sits today, from the factory about 310hp.
403 or a 455 is the way to go, both bolt right in. There's plenty of writups just use the search function... or checkout realoldspower.com.
Just rebuild those heads and find a 403 to rebuild if you want to stick with a small block or stick with the 350 if your just looking for a cruiser.
I put a pair of street strip ported #5's on my 403 to increase the compression from 8:1 to 9.5:1.
Your motor most likely puts out 250hp as it sits today, from the factory about 310hp.
403 or a 455 is the way to go, both bolt right in. There's plenty of writups just use the search function... or checkout realoldspower.com.
Just rebuild those heads and find a 403 to rebuild if you want to stick with a small block or stick with the 350 if your just looking for a cruiser.
beermonkey9417 said:
To answer the original question, no there is no way to tell what kind of car that motor came out of. The block casting number is the same one used on every single 350 built between 1968 and 1976. The #5 heads were used on every single 350 built for the 1968-69 model years. The only way to get more specific info is to tear the motor down and measure the dish in the pistons (for CR) and the cam profile (for original HP).
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