I doing this as I dont have big $ to spend .

stock but all new parts * stock as 1600 twin port heads * machined ect I would like to fit the 1776 cam I got from RAF .
and would like to know as too the carbi .can I use a 34 pic ,and play with the jet or go for with the webber 38 d gas .

I don't know about the carb, but when I looked into putting in a different cam in a T4 motor I was told that I would have to adjust the rocker geometry or risk stuffing the valve guides in short order. I would suspect this also applies to T1 motors.