i have 84 trans am that was left to me by grandpa i am just back yard mech but anyway it has been sitting 8 years buillt 355 mad eit home ok but now is running bad backfiring and shooting gas out of card and here alot of vacuume by dist. and carb will idle little high after give it gas and then idle down wher do i start plugs? carb?dist? or all the above

 

Long time sitting , many things to go wrong
Fuel goes stale after short time Drain all the fuel and put fresh fuel in
Oil change , new plugs , check inside dist cap for corrosion
may need new plug wires , possibly carb rebuilt
Basically a full service

 

Should I just buy new Carb plugs are black was running pretty good to get home Carb has no choke and buddy tryed to tune big mistake I think he tightened two front screws in to far before adjusting is this possible also poured some sea foam in card edelbrock 1407 and I hear vacuum from by dist but don't c anything

 

https://www.thirdgen.org/forums/tech...ilt-355-a.html

Helps if you only ask a question in only one place; gets confusing when one group don't know what is being said by others.
In any case , this is not a engine swap problem , just a general tuning problem

 

Yeah sorry am new to this stuff

 

If u think u have a vacuum leak spray around the area with some starting fluid idle goes up u do don't spray too much small amounts and no need to buy a carb just rebuild one don't be intimidated they are not to bad to rebuild and the front two screws are not really for tuning just for idle adjustments and if they are screwed all of the way in and running fine u likely have a vacuum leak and may need carb redone as well