going to be dropping an engine to a firebird tomorrow. the car is literally just a shell. with all suspension and body panels. no wiring harness interior engine or trans. so im getting an engine tomorrow and just want to wire something up to like a toggle switch to just crank the engine when i drop it in to get it broken in. what amp fuse will i need? and what gauge wire will i need to run from the starter?

 

I see this ending badly

Get a universal harness or replace whats missing. If you have to ask, then cobbling something together probably isnt something you're capable of doing

 

if its carbed you can do it, just be sure your neighbors like you since running an engine in the garage with open headers/manifolds is LOUD. all a carbed motor needs is power to the dizzy, and power to the starter and gas in bowls. youll need a pretty thick wire to run to the starter, then only about 12-10 guage for the starter soleniod. youll need to wire the dizzy to a toggle or the only way to kill the engine will be to pull the wire out of the dizzy.

if its fuel injected, then youre screwed without a wire harness.

 

actually i just found ur other post stating is a CC carb. you need the ecm and wiring for it to do anything. or you need to swap it to a non CC carb and vacuum advance dizzy.