According to my VIN, my Blazer actually has a 6.6L versus the 5.7L I thought it had. Now unless someone swapped over the years, this is pretty good news for me or am I wrong about thinking this. Bigger is better right? Which tranny normally came with this size engine, the turbo 350 or 400?

 

Really, no answers...

 

I have known of 2 6.6's that my buddys have owned and both had t-400 witch i was told is normal for the sized of engine and t-350 for the 5.7 . anyone correct me if im wrong.

 

i have the 400 on my fullsized truck now. i love it. it kicks the crap out of any 350 i have. lot of torque in these engines. i think the 400 may have came in some of the older 70s blazer. mine came out of a 1973 something. lot of claims of the 400 over heating because of the cylinder walls being so thin but i never ran into that issue

 

I have heard of the over-heating issue as well, but I was told by someone that this issue was fixed in the later engines. I read somewhere that the 6.6L has 300 lbs of torque.

 

You should be able to tell if its a big block just by looking at it lol. As far as the transmission a 350 has a square pan with one corner cut off. the 400 has a asymetrical screwed up looking pan sorry i dont know how else to describe it lol.

 

The 400 has 3 freeze plugs instead of 2 like the 350 and it is externally ballanced so the harmonic ballancer looks all goofy. I thought I had just a 350 til I seen that ballancer and asked a mechanic about it. I think my stock torque was 295 from the factory. But 30 years later I'm sure its dropped a bit. I used to have this enging in a 6000lb burb and when pullin a car you didn't even feel it

 

Actually if it is a 400 its probably still a smallblock which is physically the same size as the 350 The only block of this family, 400 cu in (6.6 L) small-block, was introduced in 1970 and produced for 10 years The reason for the cooling issues in these engines were usually because people put heads on them that had no steam holes,the difference in the 400 to other sbc were the cylinders were siamesed. The reason it is the same physical size as other small blocks is it had a 4.125" bore and 3.75" stroke while the other 327 and 350's had a 4.00" bore and 3.25" stroke.
You can take a 350 block and put a 400 crank with a 3.75" stroke and build a 383 cu in motor with some clearancing in the bottom end.

 

I have 3 pulleys attached to the crankshaft and all have belts attached. Would one of those 3 be the balancer?

 

Bottom dead center on the front is your balancer, it is what is commonly marked with a mark for timing too. The thing on this pic with all the markings is a really fancy one but it shows you where it is. http://img141.imageshack.us/i/img0391afg2.jpg/