1987 and up heads have raised rails, center hold downs instead of perimeter hold downs, and molded, reuseable gaskets.
Generally, 8 degrees before top dead center is typical of Chevrolet V8 engines for many years including your 1985 model.
1985 Chevrolet impala
Realistically there is no difference between all the g13a engines, 1985-1989. You should have no problem at all. Check out g13b.com you will see that they, as professional engine re builders, see no difference.
What is the gear ratio for a 1985 CHEVROLET K10 pickup
Chevrolet Astro was created in 1985.
dont know about the emissions stuff but if your planning to swap engines the ECM will also have to be switched as the 267 ECM will not work on the 305
My 1985 Chevrolet S-10 Tahoe 4x4 extended cab's GVWR is 5,208 lbs.
The payload for the 1985 Chevy S10 pickup is between 1000 and 1500 pounds depending on the exact model. The S10 is the smallest of the Chevrolet pickup series.
That year did not have one on it.
Probably Chevrolet
700R-4
Try nada.com