Turbo Differences

[SluggerXL1 at aol.com]

Hello quattro list.  My audi buddy has a 85 4ktq swapped by the dealer when 
new, purchased from Audi New England a few years back, been sitting in his 
garage since.  Originally thought engine was from a 5000, now after looking seem 
to think it may be from a URQ.  84 is the year on the engine, I don't have the 
numbers.  My question is a.) how can we tell the diff between the 2 engines 
b.) will a K26 from a 20vt work with the engine either or.  Turbo and suspension 
is all it neads to get back on the road.  Shooting to debut at Carlisle (PA) 
as soon as I figure out the AW site to sign up.  Thanks for your Time.

Russ
85 4kq