RNation0001

iTrader: (2)

i got a 5.3 with cathedral portheads. will an ls1 intake with rectangle port heads fit it?

68 RS Convertible

iTrader: (1)

no. cathedral's (ls1) will not work with square (l92/ls3).

RNation0001

iTrader: (2)

well no its an ls1 intake with rectangle ports will that work

RNation0001

iTrader: (2)

i think its rectangle anyway. i know the orings i put in were rectangle

68 RS Convertible

iTrader: (1)

someone correct me if i'm wrong but i thought all ls1's came with cathedral ports. ls3's l92 etc had square ports and ls7 had a different square port which was not compatable with ls3 or l92 or ls1/ls2. if you have a square port intake it probably is not off an ls1.

71 chevelle

iTrader: (13)

Post pics that may help to solve the mystery.

RNation0001

iTrader: (2)

ill try to tomorrow im at work right now

-Joseph-

iTrader: (12)

5.3's all had/have cathedral ports, so if you have a passenger car LS1 or LS6 intake manifold it will work just fine. It sounds like you have the right intake by the description.

gofastwclass

iTrader: (2)

This should help eliminate some confusion...