how do I identify the block type of a 425 / 455 ?

[Aussie67Delta88Custom]

And are any better than others ?

My engine rebuilder says the first 455 I gave him is stuffed, but before I let him scrap it I thought I had better ask
Gary T
Oldsmobile club of Australia.

[Oldsguy]

Originally Posted by Aussie67Delta88Custom

My engine rebuilder says the first 455 I gave him is stuffed,

Did he say how? Is is not worth repair or not repairable at all? There should be some guys on here that can help you ID an engine if you provide some data for them to go with.

[Redog]

If the motor is stock to the car, I don't think it's a 455. I have no info on a 455 before 1968.

But I could tell you what block you have, if you believe it's a 1967. The only info I have on big blocks in 67 are as follows

1966-67 [390925 block]

• ID E
  400 ci
  39* lifter angle
  0.921 lifter bore
  4.000 cyl bore

1966-67 [389244 block]

• ID D
  425 ci
  45* lifter angle
  0.842 lifter angle
  4.125 cyl bore

1967 [390925 block w/.375 drill spot]

• ID E
  400 ci
  39* lifter angle
  0.921 lifter bore
  4.000 cyl bore

1967 [389244 block w/.203 drill spot]

• ID D
  425 ci
  39* lifter angle
  0.842 lifter angle
  4.125 cyl bore

1967 [389244 block w/.375 drill spot]

• ID D
  425 ci
  39* lifter angle
  0.921 lifter angle
  4.125 cyl bore

[88 coupe]

Originally Posted by Aussie67Delta88Custom

And are any better than others ? ........

Assuming, you are talking about blocks/cranks:

Unless you are planning a "full on" racing engine, one is as good as the next.

Norm