There must be some unwritten rule that you have to start a build log after accumulating a certain number of parts. I'm currently taking a family break from stage rally (run a fwd 2.2L subaru impreza) and have always liked the caterhams and sevens and figured that building one would be a good way to have something constructive to do while not actively racing and would be the most grins per hp and dollars could be used for autox and track days and getting milk from the store or whatever. Here's the plan and/or the parts I've got piled up so far:
Haynes roadster chassis with saturn and other mods
2012 Focus 2.0L TI-VCT - 160hp 145lbs stock the focus crowd seems to be able to get 170hp/155lbs to the wheels with intake, exhaust and a tune which is probably enough. Should also get great fuel mileage
Ford Performance Controls Pack for 2.0L TI-VCT - makes wiring the engine super easy
NC Miata 5spd Trans - with stock miata clutch and flywheel
Subaru 4.11 R160 viscous diff out of an outback
Miata front spindles modified to take Subaru Rear 2wd 5x100 hubs (modded like this:
http://miatav8.blogspot.com/2014/02/five-lug-conversion.htmlSubaru 05-06 Legacy bolt on rear wheel bearings and custom rear uprights
mk4 vw calipers and brake rotors in the back for a 5x100 solution (will need a small centering for the hub) the calipers are a cable pull ebrake and the same size piston as the Wilwood dual master pedal box
Front Brakes: Wilwood 4-pots with subaru 10.1" rotors
Steering rack: Woodward manual rack
Everything else will probably be a mash up of what seems common to use here and whatever spare subaru parts (see 5x100) I can pull off my shelf.
goals: fast street plus some track for less than a good kit.
Since I know everyone here likes picts, here's the rally car:

And the facebook page if anyone is interested:
https://www.facebook.com/DoublePlusRacingHere's the pile of parts (well some of them):