Converting 05 Chrysler Sebring from 2.7 to 3.7

The 2.7 can be a decent engine but the internal water pump sucks. Even though they have a weep hole (2 actually) it can sometimes be hard to detect before it causes major issues. One weep hole will show up on the passengers side front but the other leaks into the valley under the intake where it tends to evaporate. The other issue is the hydraulic tensioner for the timing chain the o ring will fail and cause it to jump time. With the 2.7 being an interference engine it bends valves if that happens. The stop block is cheap insurance which will keep It from jumping time if the tensioner fails
This is the guy who came up With the stop Block.
Fix 2.7 Engine – Home of the Stop Block Larger companies have copied it since then.