ok I have a 87 firebird with the whoppin 2.8 I bought a 350 for a 110 from a guy on do and buying all new parts and getting as much HP as I can but I am lost on wiring when I drop it in I wanna keep it carbd what wiring can stay in the car and b used and what has to b pulled and what's the easiest way to wire a ignition system and cheapest it already has battery disconnect and push button to shut off what do I need to do

 

A wire from the IGN switch to coil positive terminal

 

the harness on the passenger side is for the ecu, so if you're going strictly carb, you can disconnect it (no cutting necessary) and remove it completely from the car or tuck it into the fender out of the way

 

so basically all of the engine wires can b unplugged from harness

 

these vehicles have a few harnesses and are pretty modular; one harness for the fuse box and guages, one for the lighting, one for the ecm, etc. the passenger side harness coming from the fender area is just for ecm-related wires. a helm's manual is a great resource for wiring info on these cars, but there is also a lot of them available here:
http://www.austinthirdgen.org/index.php?pid=19

 

holy run on sentance batman. does the .(period) not work on your keyboard? all the carbed engine needs to run is gas in the bowls and 12v to the coil. gauges require a few more wires, but those are all located in the driver side harness. basically you take the passanger side harness completely out with the engine, and tap off of a wire or two in the driver side harness to get it running.

this question comes up a lot on here, theres TONS of threads on carbed swaps. theres even an atricle in the tech section on the main page about it. a search would yeild more than enough info.

 

awesome thanks so I don't honestly need to buy a msd ignition box

 

with a mild 350, no. i ran a 450hp 388 stroker on a basically stock HEI, i just played with the springs and weights.