68' C10 motor angle

[jaywashburn]

Folks,
need some help from forum members. Just picked up a '68 C10 (2wd) that I am getting ready for an engine break in after I get everything connected. I bought the truck with a rebuilt 1977 350 motor & T350 tranny. Motor has never been fired & is currently bolted to frame w/tranny/driveline, ect.
My problem is the motor sits at an angle (the front higher). The tranny has an after market crossmember that I tried shimming about 2" to bring front of motor down; that helped but not enough.
I started looking closer @ the motor mounts & they are the clam shell type which seem to make the motor sit rather high. Is this the right motor mounts for my application?
I have a '72 Suburban (350/350) & I noticed it has the straight rubber mounts & can tell engine sits closer to frame bracket.
Any help is appreciated.
Cheers