Hi, what does everybody do with installing a340 in a early a body with the exhaust? The early A 273 manifolds have openings that are too small for the ports on the heads. Any easy solutions?
Early A with 340 Exhaust question
- Thread starter Claydart
- Start date
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Put 340 manifolds on it. They fit with no power steering. Might can make um fit with, I don't know.
I thought that they would not fit with power steering, but was not sure.
If it was my car, the power steering would be in the ditch. A bodies are so light, only a girl needs power steering. I'd much rather have 340 manifolds.
I'm trying to get away with not buying more parts. lol
I understand.
66jim
Well-Known Member
Port your 273 manifolds, I have used Muriatic acid to get deep inside areas and some grinder work no real cost as apposed to hunting down 340 manifold $$$ for minimal gains. I understand wanting PS who wants to drive dump truck thru a parking lot, I can rip a phone book in half (well almost).
Cuda416
Well-Known Member
What's this sorcery you speak of?
I didn't know Muratic acid would eat cast iron. LOL
Cuda416
Well-Known Member
you messin' with me? Pickin' on the slow guy? lol...
I mean.. it's acid so.... should corrode the hell out of it. I'm interested in how it's controlled etc. Seems like a really good idea for "smoothing" things out, like that abrasive goo porting, "sort of"...
I'd have to see it to believe it. It would clean cast but not eat it and yes there would be no control. Extrude hone is the only controlled way except for a die grinder. ANd with a grinder it's tough to check the thickness way up inside the port.
Cuda416
Well-Known Member
Cuda416
Well-Known Member
Seems it will certainly eat the CA. I suppose you could "control" it by ising gravity and hanging the manifold in such a way as to sit in certain areas. I would imagine it would take days and lots of patience, then it needs to be neutralized really well.
Interesting forum. Man those guys are all over the place. Causes rust, removes rust, don't use vinegar LOL I think I'll stay away from the stuff and trade my 273/318 manifolds for the 340's I have setting on the shelf. LOL
Cuda416
Well-Known Member
Yup, I'm with you.
66jim
Well-Known Member
I started with a scrap piece of cast iron as a test, examined the results and noted time(s). Put in manifolds let it sit for a few hours judging by test sample results. Washed with baking soda water. The acid was only put into the deepest areas of the manifold where a grinder could not reach. Be mindful of the time allowed to sit! My thought process was to smooth out the roughness rather than take loads of material.
Extrude hone before and after and the process.
Cuda416
Well-Known Member
Well, if in fact you could rip a phone book in half, then you probably could just scratch out the insides of the manifold with your fingernails! LOL
Dartswinger70
Well-Known Member
Is that a GT40 intake on the bottom?
I think the problem lies in the fit, where the 340 heads have bigger ports than the 273 manifolds and exhaust was leaking by. Are there any gaskets that can solve this problem?
moparraceman
Well-Known Member
hooker fender well
YUCK
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