Assume you are looking for a shop to do the work. I highly recommend Jurnigan Engines in Plant City. Steven Jurnigan is a wealth of knowledge and will take all the time needed to answer your questions completely, on the phone or in person. They are NOT the low price leader in the business but the prices are competitive and fair. They are usually stacked with work (says a lot there), so turn around can take a while. The quality and customer service is well worth it.
Address: 1003 Pleasant Acre Dr, Plant City, FL 33566
Phone: (813) 752-9214
Are you presently running fuel injection or carb? The basic plan is fuel injection (that's what AV 540's are designed to run), 10:1 pistons and AV Gas.