Originally Posted by clinebarger
No replacement for displacement, Throw in a 6.0L & be done with it. The small bore of 4.8L/5.3L blocks really hampers potencial here.
There are some tricks with cam grinds to increase low end power/torque, But the gains are minimal considering the labor & cost.
If you could find a used Magnuson Radix MP112 Supercharger kit.....That would be the easiest/cheapest way to "boost" your trucks power band where you use it most.
Turbos are cool & all, But I've never seen a true Bolt On kit!
I raced a guy once in a fbody who had a 5.3L with 243 ls1 heads, otherwise stock. I edged him out but it wasnt crazy. Had me a stock ws.6 Ls1 mn6. He blew up his Ls1 and found a Silverado to gank the 5.3 long block from, and swapped heads, is how this came to be. The difference in performance wasnt near as shocking as youd have thought.