Best performance vs mpg?

[PalumboDesigns]

Hey everyone,

I've been wanting to do an LS swap for quite some time now. I've been looking for a 68 short wheel base and when I get one I'll be wanting to do a swap.

I didn't realize till after some research on wiki that some of the LS engines are 454s which is something I definitely don't want.

Wiki wasn't really that informative on the LS engines so I'm confused what options there are. I'm wanting to make a cruzer that has lots of power if I feel like roasting the tires but still get good mileage when I'm taking a trip. I'm planning on using it to do some traveling around the US so mileage is pretty important.

What type of LS builds have you done and what type of mileage are you getting? What's the best I could expect out of a small block LS?

Thank you guys for your time it's greatly appreciated.