Guys I'm sure this question has been asked before in some format but can't it in the posts (no time to look at all).
I have 2 oval port heads but don't know which is what and which to use.
1 is double valve springs with a small recess in the combustion chamber all the way around. eg a small lip which effectively would give extra cc in chamber.
2 is single spring no recess eg opposite of valve is flat and flush with head.
No 2 is in better nick with no corrosion around water jackets and no skimming so that head face is proud of the castings around the front. No 1 appears to have been skimmed so much
that the casting bump where you can fit a temp sended is also skimmed away a little. Don't know whether this head wioll have too much compression for what i want. What is the step
in head 1 for. Both appear to hav same size and shape ports and valves