I don't know. Since I installed the off-road H-pipe,and cold air package,it feels like it doesn't pull as hard as when stock. Now only one person told me that the computer would retard the timing somewhat,without the cats. That was Paul, at Paul's High Performance,in Jackson Mich. He is supposed to be the mod motor expert! So maybe a chip will correct this. Either I am used to the hard accelleration of my 351 LX,or this thing is a little soft. But I know what a 13 sec. car should feel like!
<font size=-1>[ This Message was edited by: Mus408 on 2001-07-01 16:58 ]</font>
<font size=-1>[ This Message was edited by: Mus408 on 2001-07-01 16:58 ]</font>