But say I got the efi exhaust manifold and got a new intake manifold would I be able to use my stock 1 barrel carb or do I have to change it to fuel injection In other words I already did my starter. And whats my best method. It's a stock engine. And just can't get the stock manifold s (exhaust. Intake) apart so I figured I cut them off and try to get to the bolts and unbolt them..

 

They won't come apart till it comes off the truck. Watch ebay, you can find offy 4bbl manifolds cheap. do a search, and you will see a lot of options for a nice build.

 

So if I order a new stock exhaust manifold and intake manifold can I get rid of my 1 barrel carb and say get a 2 barrel. No problems?

 

Yes, Look back at the last picture I posted, that's a holley 4bbl

 

i did some more reasearch and im not going to get the headers. but im thinking of just getting another stock exhaust manifold and a stock intake manifold.. and i was curious if i would be able to get a larger carb with out any problems? any ideas.. and what about that egr tube that goes from the exhaust to the carb thing.. can anyone find those tubes..i looked at lmc truck

 

Hey ericford1984,

What is the goal for your truck? Are you just replacing leaking gaskets or are you trying to modify your truck for better performance/mileage?

 

im looking to replace the intake and exhaust manifold gaskets..but i can tell it wont be easy. the top bolts that are accesible came out easy.. the ones inbetween the two are a little more difficult...i got the carb off and the bolts that look like it holds the intake and the exhaust together wont come undone..so i was thinking of replacing the exhaust and the intake manifold.. whats the best idea..and perhaps going with a bigger carb a 2 barrel? but could i use my 1 barrel for the time and put a 2 on ina few months i just want to do the right orering of parts and keep it easy and cheap not looking for performance but im just worried about that egr tube that goes from the exhaust to the intake..can i get replacements?

 

im looking to replace the intake and exhaust manifold gaskets..but i can tell it wont be easy. the top bolts that are accesible came out easy.. the ones inbetween the two are a little more difficult...i got the carb off and the bolts that look like it holds the intake and the exhaust together wont come undone..so i was thinking of replacing the exhaust and the intake manifold.. whats the best idea..and perhaps going with a bigger carb a 2 barrel? but could i use my 1 barrel for the time and put a 2 on ina few months i just want to do the right orering of parts and keep it easy and cheap not looking for performance but im just worried about that egr tube that goes from the exhaust to the intake..can i get replacements?

 

im looking to replace the intake and exhaust manifold gaskets..but i can tell it wont be easy. the top bolts that are accesible came out easy.. the ones inbetween the two are a little more difficult...i got the carb off and the bolts that look like it holds the intake and the exhaust together wont come undone..so i was thinking of replacing the exhaust and the intake manifold.. whats the best idea..and perhaps going with a bigger carb a 2 barrel? but could i use my 1 barrel for the time and put a 2 on ina few months i just want to do the right orering of parts and keep it easy and cheap not looking for performance but im just worried about that egr tube that goes from the exhaust to the intake..can i get replacements?

 

Hey Eric,

To begin with, you won't be able to mount any carb to the stock intake manifold other than the 1bbl it came with. So if you see yourself wanting to mount a bigger carb on your engine in the future, then the stock manifold isn't the ticket.

Like others have said, you will have to use an aftermarket intake such as an Offenhauser Dual Plenum or C (Open Plenum) or a Clifford Research intake. Note: There are plenty of threads on this subject in the Inline Six, 200, 250, 4.9L/300 forum discussing how to do this. You can also check out the FORDSIX Performance forum under the 240-300 "Big Block" Six performance category. If you decide to go with an aftermarket intake, you will have to decide what brand, type, and size of carb you want to use other than the stock carb because it will no longer work. The stock exhaust will be worthless at this point because it won't flow properly to match the aftermarket intake and carb, so you'll have to use a pair of the stock split EFI exhaust manifolds at a minimum.

Basically, you are at a crossroads. Either just stick with stock, or do all of your research on here and make informed decisions.

Regarding separating your EGR tube, you'll need to try and take it off the intake and exhaust manifold while on the truck because of leverage. You'll need to soak both end connectors with penetrating lubricant at least overnight and then tap on the fittings with a hammer to help the lubricant penetrate. You might have to do this a couple of times. If you can't gain access to the nuts on the tube while in the truck, take the intake/exhaust assembly out as one unit and work on the tube that way. It will come off but you will need a bit of patience - it has been together for a very long time and been through countless heating and cooling cycles.

I hope all of this has helped to some degree. If you have more questions, let us know.

 

Excellent thank you, one last question. Do you know what the pipe that connects the two deprecate manifolds to 1 outlet .. I think I'll do the new intake upgrade to a 2 barrel and you suggest separate efi manifolds? And if I do that I won't have to worry about the egr tube?

 

Hello Eric,

Sorry for the late reply, I was out of pocket yesterday.

Yes, I would use a pair of the EFI manifolds. They are all split design, like shorty headers, but since they are cast iron, they'll have a lot less tendancy to develop leaks. You'll need to either reuse and modify the stock Y-pipe to connect the two manifolds to your exhaust or you can use the aftermarket Walker Y-pipe people have been talking about. Just make sure to clean up the back weld on the Walker Y-pipe if you use it. Since you will be replacing both manifolds, you will no longer have EGR. Also, you will need to use some sort of method to heat your intake manifold as this is important because when atomized fuel hits a cold intake runner, it tends to puddle at the bottom of the intake. The best method, IMHO, is to use the heating plate found on Home Page .

Remember, you will also need to modify your throttle linkage no matter what carb you switch to. Do you have an automatic or a manual? This will make a difference as to what throttle modifications you will need to make.

It can seem like you have to make a lot of modifications to make the switch, but for the performance gains you'll see, it is all worth it. You can ask anyone on here and they will tell you that.

Talk to you soon,

 

I have a manual, and when you say clean up the back weld? You mean plug the hole where the egr tube would be?

 

When looking down into the rear pipe of the "Y" pipe, the hole, around which the rear pipe is welded, is poorly cut into the "collector" and needs opening up to get the best flow. Some people have reported using a hole saw while others have used a grinder.

 

I'm new to FTE and have learned a ton from you all in a few days of reading. Unfortunately the old saying "if I only knew then what I know now" applies once again. After reading what has been said, I think I should go the efi manifold route as well. I took the block/head to machine shop and used a reseal kit (new gaskets and bearings). I'm doing is the durasparkII swap, my "honey" works at a parts store now, so her discount gets me "all new" except wiring harness but they don't offer the "Offy" intake so I'm keeping the factory intake. That leaves me with 2 questions.

1) who do I talk to about the "heat kit"
2) where might I be able to relieve myself of this hedman header I uneducatedly bought?