Vibration
Intermediate
Joined: Jul 2019
Posts: 30
Likes: 9
BTW, make sure you install the flexplate with the correct side facing the engine. Most aftermarket ones will have a stamp to which side is which. On a 400 flexplate, the weight faces the engine.
Thread Starter
Intermediate
Joined: Jul 2019
Posts: 28
Likes: 2
Worried
1 Should I buy another flex plate so I can use all six bolts or is three enough for a 383 2 should I buy a different converter because that one is large compared to the one my buddy has in his 3 there is no numbers on the converter so I don’t know any thing about it And 4th I really appreciate yalls input I want it to be right and really would like to learn to wrench and get to know this car
Le Mans Master
Joined: Sep 2001
Posts: 7,739
Likes: 630
From: Unreconstructed, South Carolina
Install the flexplate with 3 bolts... it's more than plenty.
Install the converter you have ... No one knows what it is & No one knows how it will perform ... if you don't like it; change it later.
Install the converter you have ... No one knows what it is & No one knows how it will perform ... if you don't like it; change it later.
Thread Starter
Intermediate
Joined: Jul 2019
Posts: 28
Likes: 2
Guys got some good news. Got Elvis back together an NO VIBRATION thanks to you guys> So I pulled it out of the garage an left a set of black marks from my garage all the way down the cul-de-sac to the stop sign. I am so happy thank yall very much. my wife said im to old to be acting like that I guess she was wrong and so is the home owners association an two of my neighbors. Them marks will be there for a long time. I don't think who ever built the engine put much in it. it has a cast intake and there is nothing special about the heads and it looks like a old junk yard engine. SO im going to start dressing it up with some chrome and a new intake while im in there would like to change the cam that would be a first for me a new set of headers and I would like some mufflers that sound like it did when I took it down the street with just headers on it and may be some of them aluminum pulleys and a electric fan. I would really appreciate yalls input
Dr. Detroit
Joined: Mar 2012
Posts: 10,097
Likes: 4,027
From: New Braunfels Texas
I live in a cul-de-sac as well and the average age of the residents was about 70 four years ago.......well everyone passed and sold off and they are all within a few years of me now. I just melted them to the stop sign myself the other day in a 71' Dodge demon 340........good for the soul and yes, they are all wrong.
Glad the flexplate fixed it......enjoy!
Jebby
Glad the flexplate fixed it......enjoy!
Jebby
Thread Starter
Intermediate
Joined: Jul 2019
Posts: 28
Likes: 2
Now I want to put a airgap intake will it fit? I ordered a 750 holly for it I need to figure out the cam I need would like to go with a retro roller cam and roller rockers and what aluminum heads I need any input would be appreciated
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Thread Starter
Intermediate
Joined: Jul 2019
Posts: 28
Likes: 2
Hello guys im back to wrenching. I need some help on my valve springs. I need to know the biggest springs I can put on these heads with out machining them so I can change cams. Or the biggest cam I can put in with the stock springs' want to bump it up a little until I get all my parts together for my new engine. I have purchased a scat 383 rotating assembly and a pair of ARF aluminum heads havnt decided on the block yet or cam. I have bought a rpm air gag 7501 and a holly 750 cfm uitra double pumper Red. Any help would be appreciated
Thread Starter
Intermediate
Joined: Jul 2019
Posts: 28
Likes: 2
I am putting the new heads on the new engine all the new parts are for the new engine. I don't know if the engine in the car can handle those heads I thought about putting these parts on there but wasn't sure if the bottom end could take it..Don't want to damage my new parts the heads were 1700 $. I am going to put the holly and intake on it until I get my new engine together. I would like to know how big of a cam I can put in it.
Le Mans Master
Joined: Sep 2001
Posts: 7,739
Likes: 630
From: Unreconstructed, South Carolina
We understand you bought a car that had a swapmeet motor in it and you don't know how or by who is was built.
About all we truly KNOW is it's a 350 block w/ an old GM 400 crank ... now a 383 or thereabouts ...
... with a sketchy build quality assembled w/ some very wrong parts ... two recently corrected.
Hard to fairly recommend without first knowing what the other parts are; old parts will be working in concert with a new part(s).
So ... What's in/on it now?
Heads: casting number
Springs
Cam
Pistons: dish/flat/dome part number
About all we truly KNOW is it's a 350 block w/ an old GM 400 crank ... now a 383 or thereabouts ...
... with a sketchy build quality assembled w/ some very wrong parts ... two recently corrected.
Hard to fairly recommend without first knowing what the other parts are; old parts will be working in concert with a new part(s).
So ... What's in/on it now?
Heads: casting number
Springs
Cam
Pistons: dish/flat/dome part number
Thread Starter
Intermediate
Joined: Jul 2019
Posts: 28
Likes: 2
ok thanks I will get the head casting number and try to borrow one of them scopes to send down the spark plug hole. really didn't want to pull the heads yet but I will if I have to. Can I just measure the thickness an diameter of the springs? where is the casting numbers on the pistons.
I have a number from inside of the piston when I was looking at the crank will that work it is 238-99 or 288-99 with a D under the number.
I have a number from inside of the piston when I was looking at the crank will that work it is 238-99 or 288-99 with a D under the number.
Le Mans Master
Joined: Sep 2001
Posts: 7,739
Likes: 630
From: Unreconstructed, South Carolina
Piston Part number may be stamped/laser etched into crown.
fwiw, piston looks like it's a TRW/SpeedPro Forging.
When full closed, measure spring OD (OE's about 1.22-1.23") ... height from head to bottom of retainer (OE's about 1.7") ... wire diameter. (OE's about 0.17-0.18")
Cam ... measure both intake & exhaust lifts at lifters or at retainers
\
fwiw, piston looks like it's a TRW/SpeedPro Forging.
When full closed, measure spring OD (OE's about 1.22-1.23") ... height from head to bottom of retainer (OE's about 1.7") ... wire diameter. (OE's about 0.17-0.18")
Cam ... measure both intake & exhaust lifts at lifters or at retainers
\
