273 to 340 swap in 65 dart

I bought the Milodon MIL-16251 aluminum pump from Summit. So I can just use my 273 w/p cover, re-mark the 340 damper for TDC and am good to go?
Again, my goal is a stealth 340 that appears to be a 273 HiPo to all but the very observant viewer.

Damn it I did not realize they made the aluminum one in the same style.

Jim, when I re-marked the dampener I used a grinding wheel to make a little tick mark so I can see the mark under the timing light and tell the difference from the 340 timing cover mark. Maybe this helps.