Seeking Info On Blocks

[~JM~]

I have 3.8L Blocks/Cranks with the following ID numbers.

#1261787

#25514290

#25505554

Any of these have any desirable features?

Suitable to replace 109?

Thank you.

 

[Anthony P]

from gnttype.org...

#1261787 3.8 block => '78 & '78 naturally aspirated

#25514290 3.8 block => '79 turbo block

#25505554 3.8 block => '78 naturally aspirated and '79 turbo block

spreadsheet shows casting 1261438 was the '78 turbo block

full listing of block, head, crank #'s in link below....

Buick V6 History

A buyer's guide to 1984-1987 Buick Grand Nationals and Turbo Regals.

gnttype.org