Is it safe? YES, if your engine is in good shape then it will be fine.
It is always safer to start conservitive say with a 75 shot make a pass and then check all of your plugs for small silver or black specks on the porcelain. Thats "detonation"
Very bad when running nitrous.
You should install at least a 155lph fuel pump. Lean conditions occur when not enough fuel pumps into the cylinder during combustion causing detonation.You should also retard your timing and add some octane boost.10 deg is fine for 75-100 shot.
With a 75 shot you will be looking at about 13.7s.
Price just goes with the condition of the kit.If it's in good shape and comes with everything it's well worth the money.
You should be able to run 125 shot with no problems on your motor given it's in good condition.Good Luck
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90 LX,full exhaust,Stage 2 Trick Flow heads,4.10s,southside uppers & lowers,Scorpion 1.7 rollers,GT 40 upper & lower,Under drives,30lb inj,B-303,Pro 5.0 shifter,70mm TB,75mm mass air,msd 6al,BBK cold air,adj fuel reg.,190lph,100lph inline, Hoosier D.O.T. slicks.150 shot NOS
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