I'm searching for a strocker for the 5.3 I know they dont go high I think 5.7 is the max. where can I get a strocker or what do I need to make it 5.7?

its not my car its for a friend Mine is having a 427 next year

 

to make a 5.7 bore it and ls1 or ls6 rotating assmbly

 

Dang Delali Dude read in your sig that your 4L60 gave up. Whats the deal? Did you ever find out what was making that grinding noise in your converter? Could it have been related to the failure?

 

Bore it for a 347, or bore and stroker kit for a 383.