What is the best way to make sure new motor is centered in engine bay?I'm installing a 355 chevy in my 1992 gmc 1500 with solid mounts.I tried lining up center of intake manifold with center of engine bay but the motor isn"t plum,if I move the motor 2 inches to the driver side the motor is plum but not centered.Should I center it and just shim the motor mount on passenger side to get it plum.

 

Use OE mounts for a reference point and call it a day. Mark the center line of the crank on the crossmember put in your solids and go off that reference mark,

 

I think 88-98 have offset motor mounts found out when putting headers on my 96

 

Thanks for the feed back,i'm going to reinstall origanals and mark like you suggested should work perfect.Crazy how we make something that easy into something difficult,thanks again