Valve question

[3739ford]

I purchased a complete valve kit about 2 years ago for 8ba engine. The 8ba had to many cracks to rebuild so I found a 1CM block, 4" stroke mercury crank, and 52-53 EAB Cam. I'm just getting around to build the engine and opened the box with the valves.


The new valve on the left and old original valve on the right. The new valve is same length, but much thicker on top and sticks up higher in the block. Will this new valve cause me problems? By the way I have EAB heads to go on the engine.


Thanks for your comments.