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This sound Byte is "under load" 1965 Plymouth Barracuda - YouTube

For y'all sound aficionado's...Straight tips out the back or downward turn in pipes makes any difference in drone..??

I noticed at Oreilly's they list a low carbon and aluminized exhaust tubing in various gauge thickness. Pros & Cons? Recommendations..?

Reminds me of picking wallpaper out with my wife. Loud or sedate...? I originally wanted something quiet & subdued, just able to hear subtle engine sounds but after getting car running after three years and playing with open exhaust/24" temporary flexible extenders I think I'm drifting...

1965 Barracuda - YouTube Sorry about fuzzy pic...recorded w/I-phone 5s..dunno.. 318 Comp 268 xe Dodge Dakota manifolds w/2' flexible extenders <temporary>

What comp cam and do you know approx. what the engine cr is.?

Sounds Super! What are your engine specs.? Do you have a clip with car under WOT load?

I'm banking on trueness of machine work, altho I neglected to check head..:/

Super responses people! Thanks!! What actually causes the crack process to occur? Thanks

I'm confident the manifold flange faces are true with respect to themselves

Hey Fabo! I'm getting a lot of advice here lately....how about this. A diesel mechanic here in town claims that an exhaust manifold will move less with no gasket (assuming head flange & manifold flange optimum true-ness) After having my manifolds shaved off by .250 he says they will...

The passenger side was scratch-the-paint tight, about the thickness of the exhaust gasket clearance! While extrapolating my desired clearance I felt .250 was needed at that time but now see .200 would be fine. I shortened my steering column tube & added a bearing at tube end and have about 3/8...

Yup..250" off of both sides. Probably could have went less..~.200" but at the time I was extrapolating w/measurements it appeared I would need that amount. I ended up using one shim under under driver mount approx. 3/16" for insurance but may have been ok with out it...

Here ya go..only mods were to shave off flange So don't use cadmium for bolts? Which ones require sealant on threads for coolant?

CO poisoning will give you a piercing headache & then dizziness, at least that's my experience! Before my 273 died in my '65 Barracuda I had so much blow-by that visible smoke was coming into the car up through the steering column tube!

Yes they are the large manifolds off of a '92 Dakota. I'll post some pics soon..

The Machinist felt comfortable with the thin spots...

Yes, I am concerned also and was curious to the the load distributing characteristics of the conical washers from the 273 over a flat washer. I figured best to put those at the thin spots and possibly flat washers on the long bolts.

I've "fitted" my '92 Dakota manifolds to my 318 in my 65 'Cuda after machining .250 off of flange face for fitment clearance. Do I need to use a washer of sorts..on any of the bolts, ya think? The 273 had a particular type of washer, iirc..

I'm using '92 Dakota manifolds in my "65 Barracuda and I shaved .250" off of manifold face AND I put a piece of steel plate (3/8") that I drilled hole out/slotted for mount bolt I so could easily slide shim out if I wanted to, without pulling mount out. Clears box fine.

Dunno about other states, but here in Texas if you register your vehicle as an antique you do not have to have an annual safety inspection.

Bring wife along

...& My 65 is an automatic with console shift, no power steering

Apologies for picture lighting, took the at end of day or beginning of night! I have a set of the '93 Dakota manifolds & was itchin' to assess fitment going in to the '65 Barracuda before I actually do the (318) motor swap. (Boy Scout Motto) I pulled the Steering coupler off and moved the...

What are the options on motor mounts for a '65 Barracuda with a 318 that may aid in using the Dakota manifolds?

Way back, on my 396 Chevelle, after awhile the glasspacks were a wide spot in the line...currently the glass packs on my tired 65 273 'cuda give it some hope..:0 Somewhere I have archived an article from HotRod magazine that featured multiple mufflers with flow comparisons and db. Don't recall...