4x4, 4.3L to ls1 5.3 need assistance
go with a T-56 and good luck finding someone who can Keep the AFM I don't even think current parformance can and he's the go to guy and the 6.2 i don't even know if the T-56 will hold up to it thats why they are running the Tremec 6060 six speed trans now. Also Aftermarket performance cams are hard to find for the AFM motor i remember hearing that the cams were different i know that the IV gen LS motor has a different 1 bolt cam instead of a 3 bolt cam like the gen III motor but i don't know about the AFM ones being different.
I can't use the T-56... It doesn't bolt to the transfer case 
And the cost to change the output shaft and tailhousing so it WILL fit... It's really expensive, lol.
Also, there's not a lot of extra performance stuff I'd be doing... Mine's a DD, and I'm in it for the fuel mileage as much as the power... My bosses 6.0L VortecMAX 4x4 gets better gas mileage than my the Blazer, lol.

And the cost to change the output shaft and tailhousing so it WILL fit... It's really expensive, lol.
Also, there's not a lot of extra performance stuff I'd be doing... Mine's a DD, and I'm in it for the fuel mileage as much as the power... My bosses 6.0L VortecMAX 4x4 gets better gas mileage than my the Blazer, lol.
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