motor home 440 build questions

This may have been covered before but I couldn't for the life of me find it.

Saturday I bought a 77 440-2 out of a motor home with the trans for $300. I am new to big blocks but I have always heard the motor home heads are junk. I'm looking for suggestions or opinions on heads for a street motor to put in my scamp. Are the mh heads really junk or do they just not flow as good as others? Do I just need to save some cash and pony up for aluminum heads? Any info would be greatly appreciated!