You need to contact the previous owner and get details on that motor. What’s the compression ratio, what the cam profile (cam card would be nice), what type of head gaskets, what type of pistons, do the head ls have bolts or studs, is the bottom end studded, what’s the compression ratio…you see a pattern here?
You are asking folks for help but providing no info. If I was a tuner you would get sent home as this is like asking if the gun is loaded while pulling the trigger.
Do not take this the wrong way. I just don’t want you to slap a 150 shot on it and loose a running motor. A lot goes into a nitrous tune and you motor is not stock so it’s hard to help.
Another thing, dump the MSD plugs and get Autolite or Motorcraft plugs. If it were me I would toss the MSD plug wires as well and put a set of Ford Racing 9mm wires on it. If your car is injected you may also want to look for a stock distributor and rebuild it. The TFI chipped MSD’s are not very reliable. Carb’d applications I will run them all day long.