I have a 1990 Baja 320, am looking to get a better ride... Found some somewhere but am still looking around....

if your running a set of mirage props try 4 blade props first..get that ass end out of the water for a smoother ride..

What size pitch 4 blades?

For example.if your running stock 23 pitch 3 blades drop down 1 pitch for a 4 blade like a 22 pitch bravo 1 prop..
Some of the older hull dont like the bravo props because they have a tendency to porpoise allot..i would start a trend in the baja section and do some asking on 4 blades for your boat..the revolution 4 may be a good prop for your application..if you dont want to spend allot of money look into the turbo props 15'' OS1 4 blade..http://www.turbo-props.com/products/...e-i-series_toi

this prop will give you a good midrange cruse..