LEATHAL Z

Ok here is the deal i put a new engine in my 95 Z...i have replaced the following parts: plug wires, plugs, opti, have not replaced the coil yet....but its on the list. The car starts fine and idles fine but as soon as i give it a little gas it pops and misses....Also another thing going on is there is a slight knocking noise as soon as i put it in gear but as soon as i push in the clutch the problem goes away......i think the transmission and clutch fork was not put on properly because my clutch feels funny.....Im thinking for the missing it could be an injector, possibly any help would be appreciated thanks