SB 318 Wanting to build for a 67 Dart GT

Ok A buddy of mine has a 1967 Dodge Dart Gt that is missing the 273 that it come with but the rest is all there.. And I can get the old car for like $1000 and is a bucket seat console car.. I have a 318 that is 60 over that I would like to know more about.. Here is the Numbers off of the motor and the heads.. If any one can tell me a little more about it that would be grate.. The motor numbers are as fallow 4006730-318-12 with a date of 11-12-70 and the numbers on both heads are 4323302 and 284 with a big 5 next to the 284.. I know that the motor is 60 over with a 10-10 crank But not shore what pistons are in it.. The brand that is.. Are the heads a good set or would i need a different set. And what would be a good cam for a 60 over 318? It had an older holly hi rise intack on it when i got it and ran good the carb messed up and washed the rings out of it I think.. I was thinking about doing a re ring and bearing and gaskets and running it..The car will be a street car and has a 727 and an 8.75 with 3.23 sure grip.. Or would i just be better off going with a big block.. Thanks for all the help and im put.. I will get the heads off to give a pic of the pistons And the number that is on them..