The way I look at it:
I think I would Never worry about the LIFE of the RV unit.. LONG LIVED from what I've been told and seen..
If you modify a stock motor and check the CCP and it is OVER 190 lbs, hard starting MAY be an ISSUE..
A lot of 96" bikes going to SE 255 cams THEN GO 103", USUALLY need to have manual Compression reliefs installed(OR Should) when the are torn down to go 103" ..
The usual complaint (higher compression) is hard starting/kick-backs ,,, when Hot starts after a shut down can show a problem.. Hard on the starter and damage to the starter clutch.
Usually these Modified bikes will have 200/205 lbs of static compression and NOT all Will BUT MANY Will do the Kick backs. (180 lbs compression is good place to stay)
Tuning and a Fueler have a lot to do with this Hard/Easy Starting also.. Two bikes built the same can act totally different from each other..???
I have SE 255's and full stage one now and use a TFI for my fueler in my 09 96" FLHR,,, I plan to go 103 when my 96" build is OLD and I will install MPRV at that time... YES ,,,,Needing and installing the relief valves at that time.
signed....BUBBIE