Will a stocker hold up considering mild converter, and a boosted 6.0, or is there a need to step up?

 

It wouldn't hurt to put a transgo hd-2 shift kit in it.

 

throw a transgo kit in and you will be more than covered..

 

Mine is completely stock and held 600 rwhp for 2 years. I now keep it closer to 500 for a daily driver.

 

sounds pretty promising. will do the shift kit to be on the safe side.

 

With the shift kit and tuned properly you will have no issues.

 

I mean, the next option is one of the finish line 4L80E's

 

I dont see myself breaking the 500 mark since this will get driven quite often.

 

why not im over 550 daily driver and it's great

 

my 4L80 is completely stock about 13-14K miles at the time adn was going past RPM based shift points with 537+......we kinda tried it with no restrictor plate....

of course not a clue what it was making powerwise but the trans wasn't happy.

the built one in the tahoe has taken a the 502 and a 200 shot for towing, street abuse regularly and quite a few big hits of nitrous without complaints with about a 2500 stall.