I am not finding any info really on this block. Are the 400,425,455 all the same block with just different parts? Is the 400 worth the rebuild time to get additional ponies or should I just put a Blue Print Crate Engine in for about the same cash. Let me know what you think.
Thanks

 

Lots of info here.
http://www.442.com/oldsfaq/oldsfaq.htm

This book is a must.

http://www.ebay.com/itm/Oldsmobile-V...-/160377363240

Basically same block, different bores. Different pistons, rods and cranks. Somewhat interchangeable. Early blocks have different lifter angle. Check out the first link.

 

If you actually have an honest 442 car, it would be ridiculous to put a "blueprint crate motor" in it.
Whatever that is.....

If you would rather customize a car, do it to a chevelle or an f-85. The 400 is worth a rebuild for sure. Good luck.

 

What do you want to know about the 400? Castings are different but blocks are mostly the same and parts interchange. The 67 400 is an E block, 425 generally a D block except 65 is an A block, 455 a F block, 68 69 400 a G block 65 400 a B block..... I think I got this right.... The E block 400 is correct for a 67. If you are looking for substantial increase in HP over stock save the 400 and build an Olds 455 or 425. As for crate engines I am not familiar with any for Oldsmobile without Big $$.

 

It is not a numbers matching car. I understand keeping a stock look under the hood. I am just undecided on the best rout. I have some reading to do from the links,, thanks. But it sound like when it is rebuilt I could make it a 455 pretty easy by just changing some parts

 

The 425 and 455 have the same bore. Cranks have different strokes and thats where the size differs. The E block 400 has a smaller bore but same stroke as the 425. To make it a 425 it needs a huge overbore which is said to be possible but not recommended for a few reasons. To make it a 455 you need a 455 crank and that same huge overbore. The conn rods are also needed out of the 455 along with the 455 crank. Easier to just get a 455 and leave the 400 alone. The 400 also has the larger lifter bores.