so i drove my new 74 home with a new block and head in the trunk plus 2 boxes of misc parts. now i purchased the car knowing it had engine issues i.e. a bit of oil in the coolant , po said he had the head off and the block is cracked. iv got a head and block but was planning on a port and polish and a cam bump. if the bottom end needs work then machining and some pistons etc. my question is for any experienced engine folks on here have any gains been found in any bowl blending port and polish and would that be primarily a track only deal . and dousing my searching i looks to be that iv got an e12 head and about 8-1 compression, any issues running 9.5-1 pistons on pump gas on the street? I'm vary experienced with americn v-8's and this will be my first performance based 4-cyl build . any thoughts or opinions are welcome and appreciated.