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These seem to have 360/340 sized ports and upper one has 2"outlet and bottom has 2 1/4.

I have a set of manifolds that were on a 360 that was swapped into a 75 duster and I am trying to identify. I was told they were 75 360 pieces but am having trouble confirming that by part no's. They are 3880905 and 3830684.

I have a set I was going to use on my 73 Dart 318 power steering. The outlets are not in a good spot at all. I think the pass side would work but the drivers side will hit the steering box and the dump is way in the back and will be an issue with steering and shift linkage. Will be retty...

I have a set of Magnum truck manifolds I bought to use on my 73 Dart and there is no way they will clear power steering. Also the outlet on the driver side and somewhat on the pass side is right up next to the firewall. Head pipe would probably be in way of shift linkage also. The bigger the...

Found the article on the exhaust manifold comparison. You would probably see a bigger spread as you have a larger cam but it is interesting reading.http://www.moparmusclemagazine.com/techarticles/engine/mopp_0307_mopar_crate_engine_exhaust/index.html

One of the Mopar mags did a test on a 300 HP crate 360 starting with 318 manifolds all the way up to TTI headers. I think the spread was like 28 HP. If I remember correctly the hp manifolds were about 11 hp better then 318 and 7 betther then basic 360 logs. Will try to find it and link it here.

My vote is for VHT high temp if you blast off all the original paint and follow the instructions it is very good for the money. It was developed for use on aircraft and is alot more then just paint.

Before you spend alot on 340 manifolds here is some interesting information. http://www.moparmusclemagazine.com/techarticles/155_0307_mopar_crate_engine_exhaust/index.html Check out this test by mopar muscle on a 300 HP crate 360. Less then 10 hp gain going from 318 to 340 manifolds, and less...

You may need the 90 adapter for exhaust clearance I know it is required if you use the HP 340 manifolds. Generally cars that came with duals used them. I had duals put on my 73 Dart with a 318 and those manifolds and there is filter clearance but it is tight. I run the 16 filter instead of the...

The 383 can be built to give you all the power you want although I generly like small blocks in A bodies it's just easier to get everything hooked up. Mod it like a hot small block it likes to rev and the torque will surprise you. That being said if you want a big block go for it, if it's not...

Regular 340 or 360 A body manifolds would be better the later ones 73 and up are somewhat cheaper. But you won't loose much on a mild street motor either way. Check out Mopar Muscle test of exhaust.http://www.moparmusclemagazine.com/techarticles/155_0307_mopar_crate_engine_exhaust/index.html...

I have a older NOS set of Dougs that have never been installed that I got off e-bay for $160. Will be going on my 73 Dart with 318 once i get them coated. They are not a step tube header but have the exact same routing and slip tube set-up as TTI. Looks like the starter can be changed with...

Thanks for the reply on this. I may give it a try and see what I come up with. I need to remove the original manifolds to re-finish and fix leaky gaskets anyway so it will be a good time to see just how much more clearance is needed. I had thought perhaps I could mill the mounting face some...

How much more clearance would it need to clear the power steering do you estimate? My trans is a 904 so am pretty sure I can mod the linkage if necessary for clearance but can only raise the motor so much.

I have a 73 Dart with a mildly built 318 and would like to upgrade the exhaust a little more. I have a set of magnum manifolds and would like to try running them. I am reading that the passenger side will not clear the power steering, it does look like it would be real close. Anybody here have...