Very good info. right now my L36 doesnt have the topswap on yet, but i have had no problems changing plugs back there. i do pull the STB for more access though. then again the engine bay is a little diff on the 1.5 Gen Wbody vs the 2nd gen Wbody most have here. i noticed that starters are a pain to pull vs on my Monte. the GP's lower radiator skirt blocked the bolts on the starter. my Z it was so easy. but back to the plugs... i would suggest knowing where each wire goes esp if it is a new to you car. tear it all apart and put it together correctly.