Good morning. Concerning the early 2.0 heads, can anyone tell me if it is at all possible to build up these heads? Well what I mean is, since I have five and I am in the process of sourcing the sixth, I thought about getting the later 2.4 version or the later 2.0 heads with the shallow combustion chamber (I hope you all understand my meaning

) I want to have larger valves install and do some mild porting work. I don't want a lot being as cheap as I am, so a little will do. I hope to go with 74mm crank and 90mm pistons. Would someone share with me as to larger valves, if this can be done. O the head must be cleaned and inspected in order to find out if I have not just bought someones trash