Re: [AMC-list] 401 Crank into a 343 how to sought

["Armand Eshleman" <aje1@xxxxxxxxxxxxxxx>]

The flywheel will be dependent on which year 401 crankshaft you use. Get a 
flywheel to match, and have the rotating assemblies balanced as a unit, 
including the flywheel and vibration dampener. AMC's are "Detroit" balanced. 
Make sure you have the correct pilot bearing (in the back of the crankshaft) 
for the transmission you've chosen.
Armand


----- Original Message ----- 
From: "Rocky Lear" <lear31@xxxxxxxxxxxxxx>
To: "AMC, Rambler, Nash, Jeep and family" <amc-list@xxxxxxxxxxxxxxxxx>
Sent: Saturday, July 30, 2011 6:53 PM
Subject: Re: [AMC-list] 401 Crank into a 343 how to sought


> I've been thinking about the same thing. The engine has dogleg heads on it 
> but given the way the rest of it was put together, I doubt if it has been 
> converted to different bolts. They must have used the old bolts. Anyone 
> have the 70 model head casting numbers handy? Changing over to the 401 
> cank will require a different flywheel, right? I'd like to use a lakewood 
> bell behind it so I need one of those with the earlier bolt pattern, or an 
> adapter to use the later.
>
> Rocky
>
> ----- Original Message ----- 
> From: "Armand Eshleman" <aje1@xxxxxxxxxxxxxxx>
> To: "AMC, Rambler, Nash, Jeep and family" <amc-list@xxxxxxxxxxxxxxxxx>
> Sent: Saturday, July 30, 2011 6:42 PM
> Subject: Re: [AMC-list] 401 Crank into a 343 how to sought
>
>
> > Another thing to think about when doing one of these swaps is which 
> > heads?
> >
> > The 70 and newer dogleg heads breathe better, use 1/2 inch head bolts and 
> > are much more plentiful.
> >
> > 70 and early 71 360, 390 and 401 heads are touted as the best.
> >
> > The 343 block could be drilled and tapped for the 1/2 inch headbolts.
> >
> > Not sure how that works with intake manifolds.
> >
> > or, after market aluminum heads??
> >
> > Armand
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>
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