There are sooooooooo many different 350 SBC combos out there and lots of them are low compression 70’s and 80’s smog motors with swirl port and open chamber heads that are anything but performance oriented. And there are a lot of good ones out there that can approach LS power while still being able to run standard ignition, fuel, and engine mount configurations (no messing with custom computers or wiring). I have a stock Vortec 350 with just a 4 barrel intake, headers, and MSD ignition in my FJ40 and it gets it. I paid $750 for it and saw it run before Dad and I pulled it. Yes, by the time you add up everything and include the cost of my Sniper EFI, I could probably have an LS. Point is, there are some good 350’s out there if you know what to look for and the proliferation of LS motors has made them cheaper than ever.