Headers On A 305
Which headers?
Assuming they're made for the application and the OEM manifold bolts don't break off in the heads, you'll probably have to do at least a little fabrication to make the accessory brackets mate up to the headers where the OEM manifolds used studs.
Assuming they're made for the application and the OEM manifold bolts don't break off in the heads, you'll probably have to do at least a little fabrication to make the accessory brackets mate up to the headers where the OEM manifolds used studs.
Supreme Member

Joined: Jan 2003
Posts: 2,043
Likes: 3
From: San Diego
Car: 1994 Trans Am
Engine: LT1
Transmission: Auto
Axle/Gears: 3.23
I installed my 1336 headers in under 3 hours all by myself. I'd say more around 2hrs, but definately under 3. I never installed headers in a RWD car before and it was quite simple. I sprayed all the manifold and y-pipe bolts with PB blaster, let them soak for like 5 minutes while I got my tools. I'd say the only problem, NOT EVEN REALLY A PROBLEM, is the passenger side. Just move all that emissions crud out of the way, and in your case throw it away.
Also, I was used to working in GTP engine bays. In a way the GTP was easier, but once you got to mounting the down pipe, forget it. Thank goodness that the 3rd gen engine bay isn't lacking in space as much as a GTP and 4th gens.
Also, I was used to working in GTP engine bays. In a way the GTP was easier, but once you got to mounting the down pipe, forget it. Thank goodness that the 3rd gen engine bay isn't lacking in space as much as a GTP and 4th gens.
yeah thanks BIGWHITE there is a 2 GTPS here in my town that are heavely modded. One swapped his blower for a T70 turbo and he is running in the high 10s. There is also another bad *** one that is modded alot but its mainly a show car. Thanks for the help i will probably start installing them tonight1
Supreme Member

Joined: Jan 2003
Posts: 2,043
Likes: 3
From: San Diego
Car: 1994 Trans Am
Engine: LT1
Transmission: Auto
Axle/Gears: 3.23
yeah thanks BIGWHITE there is a 2 GTPS here in my town that are heavely modded. One swapped his blower for a T70 turbo and he is running in the high 10s. There is also another bad *** one that is modded alot but its mainly a show car. Thanks for the help i will probably start installing them tonight1
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Senior Member
Joined: Jan 2006
Posts: 793
Likes: 0
From: Michigan
Car: 1987 Trans Am
Engine: 5.0L TPI
Transmission: 700R4
Axle/Gears: Richmond 3.73
hardest part if getting all the TPI stuff out of the way. I used a sawsall and cut all the tubes out of the way. Depending on the year. Mine (87) I just took off the air pump and cut the belt. My buddies (89) he had the serpt. belt, but he just bought a smaller belt and rerouted it. It workd good.
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