Easiest thing to do is swap everything to do with the petal since your already doing the harnesses. If you could track down a 2002 V6 cluster out of a camaro it would make life easier for you. I think it would be plug and play. Same with the headlight but I think the headlights would not be too hard to figure out.

 

Ok got the engine and tranny all mounted. We had to fabricate a mounting plate for under the transmission, because neither would fit right. I also found a dash from a 98 v6 Camaro, so everything should match right up. In order to get it started, the ignitions needed swapped to match the new computer. So much excitement.