OK guys here goes,Im runnin a 87rs 305 tbi the thing cost me 300 bux for that and a 86iroc parts car,were runnin it on less than 3/8 of a mile short track in pa,,when i bought it the guy said he wanted the 5 speed tranny an rearend out of the 87,i said sure why not,,not knowing it was aposi,,anyway,,they said it was only runnin on 6 or 7 cyl. when we started takin tranny an rear out,,found 2 plug wires off,,sent him on his way with his stuff took rear out of 86 iroc put it in 87,,now just lookin for 4 speed out of earlier model,,car runs fine so far,,just havnt torched them up yet,,so if an when any of ya reply to my post just rem im runnin on dirt and in a circle,,,,o yeah we also got a 94 pontiac in same race,,,it stays in pa mine stays here in md,,,,will try to post pix if it works,,, said file was to large will figure that one out later,,most questions will be about removing **** and computer still workin and what will fit and what want,,,,ne way thnx pew