Dude,
I know this is a hugely late response but
"Basically NO performance equipment, and the some non-crossflow pushrod type engine."
Nothing could be further from the truth. Performance equipment like cams, pistons, intakes for side drafts etc, are all out there.
And yes, it is a non-crossflow head but, and it is a big but, the japanese put the cam on the correct side of the block so the friggin ports dont have to find their way through the pushrods,,,, and,,,, an A12 A14 or A15 all have genuine 8 port heads with great combustion chamber wedge shapes ie tilted valves. Cranks have 5 main bearings and have been proven to be virtually indestructable by the "Datto" guys in Australia. And get this, the heads are Aluminum.
The race shop here in Denver told me he would guarantee he could build an A15, bored to 1600cc, mild port, mild cam, and a SINGLE weber DCOE45 that makes 130hp all day long and last infinately longer than the 1275 stretched to 1380 I first approached him about.
Had I any common sense I would have kept my Rivergate kit with 210 5 speed in the car and built one of these motors because, well because I'd be driving the dang thing right now and not visiting it once every two weeks at the shop checking on the Toyota Twincam/T50 install I opted for.
Now if you are one of the folks who likes horrendously overpowered little cars, I might be persuade to make copies of my,,,,, uh,,, stuff