If you are ditching the mid-engine layout, that offers a lot of options. I'd say go for the KA since it sounds like its the lightest option.
Well, I have not ditched the Mid engine idea just yet. I have been thinking of maybe offsetting the engine to the passenger side. I can still corner balance the car out (no real numbers just thoughts at this point). I really like the idea of the KA and need to do some research on them. I need to pick this engine/tranny up really cheap to stay within my budget. I would also need the wiring harness, ECU, and other FI bits if I don't want to go carb. All of this would have to be in the <= $200 range so I can budget other things like tubing and nickel and dime items that will fuck me on the back stretch.
Food for thought: If I go with the Dodge slant 6, I could get away with a home brew turbo setup as I would not get any BS laps. This might fall into the law of diminishing returns because of the weight and inefficiency of the older engine but it would be interesting
I guess at this point I am into research phase of the KA vs. Slant 6
If anyone has any good tech on the KA (single cam for budgets sake), or know where I can get one on the extra cheap, let me know.
Thanks again for helping me brainstorm this out. I am always up for suggestions if anyone thinks of anything else.