I'm building a... go fast device. I've got a beautiful old briggs model 14 flat head. I'm picking up a peerless 801 transaxle this weekend. I'm looking for advice on how to marry the two together.

I've kinda narrowed it down to a couple options in order of preference:

1. Run the peerless on its side

2. with engine in the front, run a long twisted v belt to the back. (with separate belt clutch)

3. buy some bevel gears on ebay and build a right angle gearbox.

4. somehow give the peerless a horizontal input?

1. Run the peerless on its side.
First, it's free. However, I need to know what areas will be starved of lubrication. It wouldn't be too hard (for me) to add an oil pump and pump oil to some ports drilled in the case. I've got all the parts I would need to do this.

2. twisted v belt
I don't know why this is above right angle gear box, other than maybe cost. It seems less than ideal.

3. right angle gearbox.
It's kind of expensive. It would be $40-50 for the bevel gears and time and effort machining a case for them. I'd rather not do that.

4. horizontal input mod?
This seems like it wouldn't be SUPER hard, since the gear shafts are already horizontal. I probably can't machine a whole new longer input shaft that sticks out of the case though.

I've got machining skills and access to a sizable CNC, however metal stock is expensive beyond what I already have laying around. I'm leaning towards option 1. I'd need to remove all the grease and use gear oil, drill an intake port at the new bottom of the case, and drill some outlet ports where lube now needs to go, and plumb it up with some tubing and a little pump, which I have. What do you think?