personally if you upgrade the transistor to a pwr2, and use a msd blaster coil or two, and just throw on a t25g, and time it to 17 btdc instead of 15 btdc, you should have all the umph you want for one day and then will get bored of the slow to go motor lol. 9 psi is pretty high, especially considering these are old cars with old motors, id run it about 7 max unless you did the rings on it. if you want mpg then dont do the t25g lol. if you want reliability then dont do any of it except the pwr2. if you dont upgrade injectors you shouldnt really need a tune with the way youre going. plus the t25g alone is a day/night difference than our t2