If i was to do a compression test and the compression was the
same would that rule out a bent conrod?[/quote]

I know the compression WONT be the same due to @ least a couple of valves being bent m8 sorry to say

doubt you've bent a rod tbh if that's helps with the blow!

either way the heads got to come off IMO and you should be able to access the other damage to pistons etc!