Hello All,

Just a quick question in regards to which headers I can use for a rocket 350 in my 85 cutlass supreme with the least amount of fitment issues. Direct bolt ins would be great but the only ones of those I have found cost close to a grand. Any direction would be greatly appreciated.

 

Spring for the american racing headers. dont 1/2 *** it.

 

A rocket 350 is a direct bolt-in for a 307. You can start off using all the 307 external parts and accessories. You will probably not be happy with it, since you likely have the tubular exhaust manifolds. They will fit, but SEVERELY restrict the 350. Try to use the manifolds from the 350. You would need to weld a bung into the exhaust to keep the computer. This has been discussed many times here. I would suggest a search of the forums. A 350 or 403 can be made to work with the GM CCC system, but not without some work.

I plan on doing this swap someday. I have a 1971 350 on a stand, but the 307 is showing no signs of giving up, so it will be a while. I will document the process as it happens.

 

I have manifolds for the 350. But thats the easy way out, and not really what I'm going for. I don't mind doing a little work to get the headers to fit.... As for doing it right I'm really only trying to spend around 400-500 dollars for them. I don't have much money into the car or the two 350 motors I have for it so I can't really justify spending more than that on the headers...

 

I looked on the summit website and all I came up with were hookers. You might give them a call and see what your options are.

 

A quick search of Jeg's comes up with 10 choices:

http://www.jegs.com/webapp/wcs/store...245+4294965578

 

THANKS HENRYK8398!!!! YOU'RE AWESOME!!! and out of those 10 which ones have you personally used on a rocket 350 swap into a g-body????

 

Also, just because you're prior post heated me so much. Don't give input on threads that ask for advice if you haven't actually done anything. Anyone can sit down and read forums and google search how to do things and the fact of the matter is everyone has a different solution. I only post if I don't like a solution I've found in somebody else's thread. Which makes sense doesn't it??? Because it isn't my car they are posting about in someone else's thread.

 

Rocketpowered,

I'll admit I misread your initial post and didn't realize you needed header part numbers. Sorry about that. I think I cleared that up. As per my avatar and nickname, you can see that I do not have a G-body. I don't intend to buy one, but I do like to help people here.

You say anyone can search google. Fine. If that was the case, you wouldn't have needed someone else to search Jegs for you. There is a specific forum for G-body cars where I'm sure the upgrade has been done many times. There are several members here who are on that forum. I guess you missed that one during your expansive and exhaustive google searches. I'm sorry that my first response "heated you". I had no intention of doing that. This is a free forum and you should be appreciative that anyone cares enough to help you at all. I'm done with this thread. Have a nice day.

 

HenryK if you spent half as much time working on your car as you do trolling forums and doing parts searches on jegs, you might actually offer someone some useful information....

 

Is there a reason why your jumping someones case for trying to help you. I'm sorry he might have hurt your little feelings by suggesting, oh my, exhaust manifolds. He's right, if you took the time to google headers that fit your car, and possibly made a techline call, you probably would not need to ask this question on here.

With only 10 posts under your belt, you have not earned the right to belittle another member on this forum. I think you owe Henry an apology!

 

I wasn't referring to his post about using the manifolds I was bashing him on sending me a link to jegs, who will not get any of my business. And a simple google search reveals that most of the cheaper headers require modification I was simply asking which headers can I use with this swap with little to no modification without spending 800-1000 dollars. Not, does anyone make headers for my car???

 

He was not trolling, just trying to help.
If you did not like what he gave, then just ignore it and await the next response. It was free advice, take it for what it is worth. He did not even know that you dislike jegs.

An apology is due, indeed.
BTW, belittling others is not allowed after 10 posts, either...

Not at all a reason for bashing another member.
In fact, the forum rules prohibit bashing other members for any reason.
Please review the forum rules here:
https://classicoldsmobile.com/forums...aq_userconduct

Now that that is all out of the way, let's try to find some headers for your car!

 

Ok, now that we are on the right track. I suggested earlier when I looked up your car is to call Summit and now I also suggest to call Hooker direct and see what they say. I came up with only 2 sets of headers and both were in the $450+ price range. I think you will get what you pay for in this case.

You can also get on the" G"body forum and see what they had success with. Most of us play with older "A" body stuff so in all honesty, we do not know. There may be some membesr here that do and hopefully they will chime in.

 

The American racing headers fit nicely, everything else will be a bash fest unless you manage to locate shorty headers, and at that point, you might as well stick with manifolds.

Not trying to be a jerk here/I wish I had better news for you. Fact of the matter is: G bodies are at least 3" skinnier than any previous GM full frame platform. The room simply isn't there to stuff any random header into them like other chassis.

 

Thank You J-Chicago and Oldcutlass. I also apologize for causing that brief uproar as I am a new member to this forum. Thanks for getting the thread back on track.

 

What did you decide to go with?

 

So I really don't want to spend the coin on the american racing headers. Do any of you have any experience with the Thornton JR manifolds??? I know they will fit... I'm just looking for some opinions.

 

Most people use them on 65-67's because of the limited availability on sbo headers for those models. Did you give Hooker a call?

 

Do it anyways. You'll never regret it.

I had a set. They look like crap out of the box with lots of casting boogers and the not-so-center divider. Exit on the drivers side manifold is ever so sleightly angled towards the front instead of directly downwards too. The center divider ( until it was milled down and arched ) looks like more of a restriction than anything. Once ported/modded, I would say they would definitily flow better than stock but it's not worth the cost or effort. Cancel your cable for a couple months and/or cut out another needless expense and put the saved money towards getting the AR headers.