is there a difference between 87' 350 and 94' 350 i picked up a 94 camaro with bad motor i have an 87' lt-1 short block i want to put in the 94 will the heads,timing cover,and intake work on the 87' motor

'87 LT-1? There was no such thing.

But, your '87 heads, timing cover, and intake will work on a '94 truck block, but not on a '94 Camaro block.