440 low compression build

Im looking at building a low compression 440 engine from an rv i know to make decent power i need to up the compression ratio what the cheapest way to do this and what parts are needed??

Also im looking at fitting either edelbrock (Performer RPM 482 HP Top End Kit for 1968-79 Big-Block Chrysler 440 Engines) or trick flow top end kit (Trick Flow® PowerPort® Top-End Engine Kits for Big Block Mopar 440 TFS-K616-620-576) what peoples thoughts on both of these.