My old motor is a 1990 305 tpi, the new motor is out of a 88 truck, its a 350. the first pic is the 305 hold down plate this is the pic of the new motorwhat does the new plate look like, where can I get it?

 

it appears that it wasnt drilled for from the factory you could drill and tap it yourself or not run the plate intead you would use a cam button that would go infront of the cam sprocket and ride against the timing cover

 

Yeah, truck motors of that vintage often used the same block as passenger car engines, but they used flat tappet cams in them. That means some of the stuff for the roller cam may not be drilled/tapped. The hold-down bolts for the lifter "spider" is another place you may find it's not drilled and tapped.