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

["Rocky Lear" <lear31@xxxxxxxxxxxxxx>]

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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