The 4.3 is basically a 5.7 with two cylinders chopped off.
I have had several 4.3's.
Good luck.
Yep!
I'm on #2 in the Blazer
How do you tear up a 4.3???

I am on my 4th truck with a 4.3.
I have put a "TON" on miles on them and have had almost no trouble with them AT ALL.
The one that burned in my garage fire in November of 2006...(it was a 1999) ... had a "QUARTER MILLION MILES" on it.
Still didn't use any oil between changes and ran as good as the day I bought it new.
The 2006 I have now... that I bought in 2007 .... has over 80,000 on it.
All I have ever done to it is put gas in it... change the oil every once in a while... and drive the heck out of it.