Hi !
First sorry for my english.
I have 1981 chevy caprice with mechanicaly unmodified 305 (about 145hp in papers). engine has remowed EGR and any others electronics and antipollution systems.now I buy Edelbrock items on ebay. Could You help me with approximate engine parameters hp and torque after customization?
I have got to install:

1405 carburetor: 600cfm, standard jets, manual choke
2101 performer manifold
2102 performer camshaft witch lifters kit
and non edelbrock headers 1 1/2"

It is necesary camshaft timing or instal it with standard position in this aplication?
heads are original
transmision TH350
thanx for answer
luiss