well i bought and build a 4.1 l this winter.... and even bought a new timing cover and oil pump set up from e bay.......says n.o.s well have any of you had experience with the edelbrock cam with the 4.1 l my cam sensor wont drop in at all ,its binding....completely.with the edl cam,have any of you had this happen... i think its the cover... if you see them on e bay...the 2 i bought that were n.o.s.... arent.the cam sensor holes are off center... dont do it....somone please call me if they have run into this with the cam soo i know if i need to change the cam sensor gear or the cover is the culprit? 978 353 9152.... much appreciation Troubled Jim.... in massachusettes :dunno: 