[vinniekq2]

If you have a bigger cam and rebuilder pistons and lower compression ratio,you will have tuning issues and not as much power as you should have. That little cam has correct specs for your application,BUT!!! if your CR is compromised then the parts will not work well in this engine.
Its not even easy to do a head swap to increase cr.You might have to take the engine apart and deck the block and shave the heads?You are using 283 heads?

 

[vinniekq2]

you should calculate your CR with 49CC heads.If its good you can buy excellent heads with those chambers.your engine should be .060 over