Thank you for the info both of you^^^.
yes I was surprised a tech could not answer what I thought was a simple and very common issue. There are tons of Vortec crate motors used in hotrod apps out there just prior to the LS craze. I find it hard to believe that Fluidampr never had to answer this question to someone wanting to spin a L31 motor up a little more in the RPM range. It is common reading to find the stock dampers on the crate motors will slip with a little abuse.
As for the longer snout, if I am in fact sitting out an 1/8" further it is no issue at all for me-Why?- I run an electric waterpump and an underdrive dual serp crank pulley running only a powersteering pump 5 rib on one side and a 6rib Alt on the other side of the motor- both are adjustable mount units in the fore and aft positions from March Performance. I have about 1" adjustment on the pump to keep it lined up with either a short or long snout waterpump even though I don't need it for that.
Timing is an easy fix. I generally run 3* advance off base timing so I will set the motor to 0 advance with this current dampner and then switch to the new unit and record the "new zero" at whatever degree it reads in my little notebook of modifications (I should say big notebook
78 lincoln mark7 rotors, 86 svo rear calipers, chevelle balljoints, 1330-1350 conversion u-joints, etc etc etc. I something ever happened to me no one would know what the heck this vehcile takes in replacement parts- I try to keep what I can under direct vehicle reference for future maintinance- hence why I asked for advice but I see I'm pretty well versed already on my choices.
Thank you guys
Dean aka Vetruck