Hi, these forae (is that the plural??) are based around versions of the Lotus 7 but plenty of people diverge and talk about mid engined self-made and designed cars. Words like "middy" or "BEC" (bike engined cars) are useful searches on the sites.
here's one:
https://www.locostbuilders.co.uk/vie...php?tid=204296
spectre-rolling-chassis-003.jpg
and the mid engine section:
https://www.locostbuilders.co.uk/forum/26/
one contributor sells a book on the subject:
http://www.lulu.com/shop/kurt-bilins...-21330662.html
and the USA Locos site mid engine section:
https://www.locostusa.com/forums/vie...255550dc21cfd9