hey i got my lsvtec put togather and i want to time it and get it running right without my turbo on it right now. my problem is though i have 2 ecu's a chipped p28 for boost with 440s, and a stock p75 ls ecu. can i use the p75 to just get the motor running right and timed before i put 440s in? i heard the p75 is the same as p72 gsr ecu just without vtec, and someone else said the timing is different. help!