building 273..or not

so i plan on beefing up my 69 dart gt 273...i i have a spare 273 i want to start building but i have some questions want to achieve decent hp..im know 273 anrt the best producing motors but hey i have it so ill work with it..

so ill be using stock crank,it has forged pistons but the block isnt bored and the pistons dont have a dome?? just 4 valve crest's like stock 2b pistons.not sure what thats all about any ideas?

thinking of comp cams 4'8/4'9 cam lift and like 260 duration...

i have a original 4 b intake not sure if i should use it or go with a performer...its heavy as hell..and 625cfm demon..the block I'm building is stamped 10-6-66 so I believe its the motor that falls from 66-69 273..the pistons I have I think produce 9.1 ???what came to use for this set up

is this build worth it...any ideas on hp torque..new to mopar but damn is it addictive...kind of what to do a 273 just for kicks is it worth it..??thanks fabo