Can i change the engine in my 1985 blazer 2.8 to a 1989 blazer 4.3 with out changing tranmisson. both r s10 blazers and both have auto 4x4 trannie

Can i change the engine in my 1985 blazer 2.8 to a 1989 blazer 4.3 with out changing tranmisson. both r s10 blazers and both have auto 4x4 trannie
NO SIMPLY NO....the 2.8 is a 60 degree v the 4.3 is a 90 degree v ...sorry to break the news

NO SIMPLY NO....the 2.8 is a 60 degree v the 4.3 is a 90 degree v ...sorry to break the news

ummm.... The cylinder configuration has nothing to do with if it can bolt up to the transmission.

If it is the same tranny, you might have to swap out computers and engine mounts, but it should be able to be installed with some work.

ummm.... The cylinder configuration has nothing to do with if it can bolt up to the transmission.

If it is the same tranny, you might have to swap out computers and engine mounts, but it should be able to be installed with some work.

No. The transmission will not bolt.

The 60-degree engine has a transmission bellhousing area that's a little bit more than half the size of the 90-degree block. It's the same bellhousing bolt pattern that's used on FWD cars. The 90-degree block uses the Chevy V8 bolt pattern.

No. The transmission will not bolt.

The 60-degree engine has a transmission bellhousing area that's a little bit more than half the size of the 90-degree block. It's the same bellhousing bolt pattern that's used on FWD cars. The 90-degree block uses the Chevy V8 bolt pattern.
That what I've always heard about a 4.3..... GM took their best motor the 350 and cut the back two piston holes off and made another good motor the 4.3.

That what I've always heard about a 4.3..... GM took their best motor the 350 and cut the back two piston holes off and made another good motor the 4.3.

Close - the 4.3 is a 6-cyl variant of the 350 V8, but it's the FRONT TWO cylinders that have been hacked off. :) It's okay, most people think it's the back two, so you're not alone by any means.