383 and 2" ex. pipes

ive gotten a 383 shoehorned into a 74 dart finally after a lot of work, now im in the process of hooking up wires cables hoses etc. im running low on $$ , and i needed to get an exhaust system. so i have pulled a complete dual exhaust system of a b body. ive cut it to fit and its looking ok, the only draw back is its a 2" system . what do you guys think about it, will it really choke the engine down much? i have headers on the motor, i think they are 1/3/4 " . the engine is a stock 1971 , (the last of them and lower compression) so its pretty mild.