forget the awd. the only real choices of parts you have, are from a CRV, and are not made for performance, so they dont hold up under heavy loads. let alone most of it being custom, and expensive. K20 is a good idea, but VERY expensive, and yes, you can do the 6-speed. but easiest choice would be the B18c1, GSR. unless you plan on going all-out, as in full sleeves and a custom build, then you can save a bit of money and start with an LS block, then add a vtec head once its built. also, a b16a head on a gsr block will drop the compression a bit, and flow better than the gsr head, so thats a great choice for turbo.

 

to throw a number out on the table i believe se7en said his turbo k20 setup (not including the rebuild price) was something like 8 grand