I am swapping my 305 tpi to a 355 carburated engine. I was told that you need to change some things in the fuel system.I was wondering if there is anyone who knows what to do. Thanks.

 

first lets get this out of the way before someone else does ( someone here is gonna tell you that the swap is illigal) . i hate that , but maybe now no one will mention it anymore

if you are goin to carb. you can use the pump in the tank but you will need a regulator for this. ( i have one i can sell by the way) this reg. has the return line on it. you also need a fuel gauge to make sure what pressure you have. the reg. i have is adjustable with the factory pump to go from 2-15lbs. there is another thread here somewhere that says how to hook up the pump through the oil sending switch. when i used mine i ran a swich to the relay.
if you dont want the factory pump... take the tank out , pull out the sending unit etc. take out the pump and put a peice of steel line (the same length )in place of it with a union fitting. sometimes also called a high pressure fitting. clamp on screening to filter the gas. put it all back together. and route your fuel lines to the pump on the block ( or use an aftermarket inline electric pump)

there are alot of threads that explain all about this. try doin a search. there were a few posts on this a day or two ago , so it shouldnt be hard to find, good luck

 

#1, welcome to thirdgen.org.

This is a common question. There is a sticky in the top section of this forum "Welcome to the Carburetor forum, please read". It contains this link: https://www.thirdgen.org/carbswap

(And, yes, swap to a carb in an '89 chassis is illegal in all 50 states for a street driven car.)