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Re: 1989 R3500 blown head gasket and cracked head
The 383 crate motor would make a nice upgrade and all your external components would work.
The 383 is a vortec so you would need to change your intake;the ht383e is set up for for a 96+ truck but it would work if you used the intake from a 96+ vortec unit.
You could also change up to the overdrive trans as used in the 1991 trucks.
I had a 91 dually crew with the 454 efi/overdrive trans ...never should have sold it.
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