i think i would go for the rebuild. it should be easier than a swap, and the 6.0 is an iron block as opposed to the aluminum blocks the ls1/2 have. wouldn't make a huge difference, but it's been my impression that the iron block will be better suited for the higher heat that is produced from doing "truck" things like towing heavy loads and wheelin offroad. not to mention you could rebuild it with some high end forged internals so it can handle all the power you can put on it!just my two cents.
2000 ECSB 5.3L with K&N CAI, true duals with flowmaster 40s, and 200k miles!
Okay this kinda changes things for me a little. Id like to make somewhere between 375-400hp but retain decent mpg and ability for long highway drives if possible. I am working on a pretty tight budget which is why i figured a ls1 swap would be cheaper than rebuilding the 6.0. the original plan was to drop the ls1 in it (which i found for $1k) and rebuild the 6.0 over time.
How much will it cost to have a shop go over the block?
should i have it bored out?
Can i put ls2 heads on a 6.0 block? or is there a better gm stock option for heads than whats on the truck?
BTW i know nothing about the 6.0 motors
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