Post by
Eikon »
https://forums.nicoclub.com/eikon-u15727.html
Wed Jan 20, 2010 4:31 am
yes, the LQ4 was built in 2500 series trucks starting in '99. If you plan to go with a manual trans, you'll need a 01 or up. The 99 and 00 models had a crank flange machined to only fit the 4l80 transmission. To fit a T56 in an early year you'd have to swap the crank. You can do it, but it's a pain.
The LQ4 has a wider bore, so it turns out to be 6.00L. That wider bore allows you to use the L92 heads designed for the new 6.2L motors that make big HP. Those heads are awesome, and cheap! You can get them fully assembled from GMPP for like $400 each through summit racing or other places.
You can find LQ4's used through car-parts.com or on ls1tech.com or other places pretty cheap. You'll find one for less than $1000 easy. I have two of them, and didn't even pay $1000 for the two combined. '
Another popular choice is the 5.3L. I forget the engine code on that one. They are also significantly cheaper than the ls1. They are aluminum so not as heavy. They are easy to find used because they came in tons of 1500 series trucks for years. You can modify them nicely as well and get plenty of hp. You could always add nitrous as well.