5* or 8* firing it up won't really matter, the most important thing in the position you're in is that the engine fires up quickly to not wipe the lube off the new cam before it's running to lube itself properly. Also are you using a zinc additive or a break in oil or better yet Diesel engine oil to protect the cam and lifters. Regular (modern) motor oil will likely take out a flat tappet cam and lifters over time. Good luck, nice engine.
Abner-73 He started it all in 1979 (plow truck now)
Bufurd-69 Fixed up to take Abners place as DD
Delta-70 Built for fun, 455 Olds, T-18, D-20, 4:10 gears
Humpty-74 J-20 4BT, NV4500, 30+MPG
07 JK Wife bought new...
13 Grand Cherokee Trail Hawk, wifes new ride