Quote Originally Posted by Chiro View Post
Thanks for the reply. I just spoke to the guy who is going to do the conversion and he mentioned not to get the electronic pump if I go the GU route. The guy doing the job thinks the GQ silvertop would be the go at that price.

Do you have an opinion on what the better way to go would be motor wise?
Quote Originally Posted by johno90 View Post
What exactly do you want?? thats the real question, if you want a good ol 4.2 with 100-150hp then go the silvertop for the price + a dc3 pump. If you want 150+ then the factory turbo hands down but you will need a new turbo and pump.
Are you looking to do the conversion yourself or paying someone to do it? Just wondering as it only cost me $5300 for my whole conversion including the motor to do it myself. Diffidently +1 on swapping to the 4.1 diffs ive just down that. 4.66 are fun but for highway cruising way to high in the rev range.
Totally agree with johno.
What are you looking for?
A mild 120-150hp setup go the gq engine for sure..
And blokes have been running these figures since early 90's..

My old silver top is still going at 527*** (when I sold it 6 months ago). Granted it was NA but they are built strong..

Imo if you want a cheap build go the silver top..
If your planning big numbers and room to grow go the newer gu td..

But again as johno has said you'll want new turbo anyway..
A stock gu turbo and 10mm pump will comfortable see 100hp (stock na is about 85hp I think) but it wouldn't be good for much over 120 I would think..