I am the proud owner of a new body style 2007 GMC Sierra Single Cab, Short Bed, all black.. The truck is my daily driver, and my tow rig.. Only problem is that the 4.8 really hasnt got enough power for my towing / Fun needs.. I recently came to own a never fired 5.7 litre LS1 camaro engine, it is of the 1998 vintage.. I am really wanting to swap the two.. Externally they are the same right.. The LS1 is lighter, i picked it up and put it in the bed of my truck.. However i know that the crank reluctor and cam sensors are different.. I plan to update the cam with a TR220 cam, install some headers.. change the cam and crank sensors to work with the E38 ecm.. I was wondering if the flexplate will be the same, engine mounts, starter and such, i wish to also install a set of L92 heads.. Will my stock fuel system (including manifold and injectors) work with this engine? I was thinking about going all out and building a 383 out of it.. I know you are all going to say that i should just get an L92 or LQ4 and swap that in but this engine was FREE..arty: So i am going to use it as my base.. What do you all think?? Thanks in advance for the help and advice.. Also will the 4l60 be ok with this engine in front of it.. One final question.. This truck was ordered by me with the towing package, but i forgot to order the 3.73 gears, i have a new set of Richmond 3.73 gears for an 8.5 inch 10 bolt rear axle that i originally bought for my 79 Trans Am (no its not a BOP 10 bolt) so do you think these gears will work in my rear axle? I have the G80 diff in the truck that came with the towing package.. Yukon gears said they would,:gasp: i am not sure as to if the speed sensor in the axle will make a difference or not.. THANKS.. ALL responses are appreciated..