Buying a '69 911T project - advice on rear suspension and carburetor jetting

[911TNewbie]

Hello,

I am buying an unfinished '69 911T-project from a friend. The car was drivable couple of years ago after which the engine has been swapped into rebuilt '70E unit plus he started working on the rear suspension.

Not exactly sure what was the plan with the suspension work, but the car is offered with 901 (incorrect year) or 915 transmission. Both are supposedly complete, 901 has been removed but no other work has been done. I can hand pick the parts to be used.

Is there real benefit in using the aluminum rear arms and/or the later spring plates with 901? If I choose the 901 transmission and aluminum rear arms what parts must I source from 915 or elsewhere?

The engine is a '70E with 2.4l crank, J&E 10.2:1 pistons, '69 T carbs, Solex cams, connecting rods from 2.7l engine and there's some work done with the oiling system including post '76 oil pump.

What jets should I pick to get the engine run with ballpark air/fuel-ratio? The seller hasn't much 911-engine building/adjusting experience and he suggested in getting the '69 E and S jets to begin with. After the break-in the carbs would be adjusted in dyno-session.

What would be the best source for Porsche Weber-parts (jets etc) in Southern California?

I have some previous experience on semi-fast Cal Look VWs and can do/figure out basic maintenance like the suspension stuff, the 911 engine is outside my comfort zone. Just looking for a way to get the car running with minimal hassle and enjoy it for next Summer.