Yes I would be very concerned about running it in to turbo in take one big droplete could really ruin a turbo spinning at those speeds. I have had no luck finding a 79 300sd at junk yard, Untill I find a better way I guess I will just have to try running it into a catch canister its a rebuilt head on a sound lower end I just hope it will not loose to much oil by not returning itr to crrank case.
dave.