So i have a 360ci motor with a timing chain cover that has the timing marks embossed on the driver side of the casting. I have a cast iron water pump with the outlet side on the driver side as well, very conveniently covering up any view of my damper and timing marks. I honestly don't think my timing has ever been correct since the motor has been put together because of this very problem. I have therefore decided to tackle this issue myself and have fabricated a little metal marker for the opposite side of the pump where there is no obstruction to viewing. I mimicked a similar one I saw pics of online. Here is my solution. I drilled a little hole on the new timing marker where I will now mark TDC on the damper. Now I just need the piston stop to find true TDC and I'll be in business! The bolt where the new marker is attached to was 3/8 wide and was located at the bottom left of the water pump, I just created a slot instead of a hole in the metal piece since I couldn't extract the bolt fully with out removing the pulley.