1973 340 Cam advice

Wow, thank you so much for the replies guys! :D I've just had a 6 hour drive and have 4 hours sleep now before catching a flight so I'll digest all that great input on the flight. :)

As a point of interest I have another '73 340 that will be getting built over the next year with 1970 stock 340 rotating parts and heads so my money will be going into that project.

The 340 I've just got only has the 2bbl manifold and all the other bits and bobs, Dizzy etc. (Can that be used in a 4bbl?) I'm not wanting to spend more than I have to get it running in the Charger. The Weiand was thrown in with the deal so I'd prefer to just use that and put a second hand carb on. I'd be happy changing the cam if it made a noticeable difference and the rear gears too as they will stay when the other 340 is ready.

I'll get the heads cleaned up as there is a lot of deposits and get the valves lapped in. Going off topic would getting the heads slimmed and running a thinner set of head gaskets be worth the time? Or should I just dump it in?

Many thanks,

Andy