jrpollinger

I just recently traded for a LM7 5.3l it has 862 casting heads. Should I get rid of these heads or have them ported and a valve job done along with new springs? And what springs to run along with what Valves to put in the 862's Or try and get a set of 243 castings? I am going to be running a vengeance racing VRX5 cam and a 150 shot of nitrous. Hopefully I get some feedback. Thanks to everyone who replys!