I'm trying to graft Mazda MX-5 electric mirrors onto Wee Beastie. Did I tell you that I hate white knuckle lane changes on I-80, I-480, and I-680 in a car that's 2/3 blind spot? Plus the old vintage sport mirror droops and won't hold adjustment. The joystick is from a Ford Contour. The fit between the pigtail and the window glass is a little close. I'm now in the middle of grinding the mirror base down to match the contour of the Pinto door.

Looks great. I was wondering how they look from the side as well.

It mostly depends on what you're going for with the Pinto.  As long as you're not aiming for a stock look, I'd stick with the Mazda mirrors for safety reasons.  My '72 is bone stock and I'm not about to swap out my sport mirrors, but they are so small I feel like I'm taking my life in my hands every time I change lanes! 
Dwayne