Thank you for your concern and I do mean that. I do have the shop, ability and well time is one of those things you never have. A little back round on me is that i grew up around mussel cars, have worked in a restoration shop 3 years a motor machine shop 3 years while becoming a engineer. I built my self a a good shop, lift, powder coating oven, lath, Bridgeport, and a cnc 3 axis mill, and all the normal shop stuff. I am not trying to brag just letting you know I have a strong foundation. with 14 custom cars under my belt I am fairly confident but that dose not mean I can't learn from people especially ones that have focused on one specific car and know it top to bottom.
I am thinking the miata motor because I think it fits the idea of alpine the best and I think the miata is the pinnacle of the small sports car (lotes could be better). also I raced spec miata for season and a half till i put it in the wall. I have rebuild a few motors rear ends and trans so I know it well. With its plenifullness, cheep , reliable parts. light weight hi reving motor it should be fun.
Sorry for the long winded post. I look forward to being a member hear and have already gotten alot of help from members thank you.