Ballpark Hp

was just wondering if i could get some opinions on what i might have hp wise and what it might run in good conditions...also if i need a tune or not ive been told my car won't be able to get tuned cause of how old it is or something to do with the computer not exactly sure what they were talking about i thought it could get tuned just fine..i have no idea about tuning so idk

its a 1989 fox body, 5speed

the stuff thats done to my car:

its been bored to 306
gt40 tubular upper intake,cobra lower
24lb injectors
70mm throttle body
shorty headers into xpipe
edelbrock performer aluminum heads
trick flow stage 2 cam
king cobra clutch
3.73 gears

i know wanting to know hp and what it might run just by reading a little mod list is asking a lot i know it depends on a lot of different things i was just curious if anyone could just give me what they thought it might be..like i said im aware its just going to be a ballpark guess...and if anyone has info on tuning if it would help me or not or if it can even be tuned.

i would appreciate any feed back thanks

Well sometimes it does something weird when i try to get on it was told to check my tps so i did and its dead on so im not sure what it is..but when its not acting up yea it runs pretty good

Ok thanks