Anyone have any clue what is the maximum duration a TBI system will take on a 355 Chevy. Would 213/219 duration at .050 be too much for the stock computer or might it work fine. Thanks. Igor. Igor Todorovic, U of C 1981 Delta 88, 455 4bbl 1988 Pontiac Trans AM, L03, T5 WebSite: http://members.home.net/igor455/olds.htm