Quote:
Originally Posted by steve25
Here's another question .
Has anyone ever seen a factory replacement block for a 389 that had the 3 freeze plugs per side?
67 was a bit of a crazy year for the factory with the change over/ overlap of motors!
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There was a 66 389 SR block on ebay last year that had the 3 freeze plugs. It was unused and had the pistons with it. Was cast is mid 68 I believe.
Here is a thread I started on one I found.
https://forums.maxperformanceinc.com...d.php?t=836287
I have a 421 SR block that has 3 freeze plugs. Basically just a 1967 4 bolt 428 with a 4.090 bore.
Casting number was ground off but never restamped.
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65 GTO, Tiger Gold, Nostalgia Super Stock 421, 2-Carter AFB carbs, Stock Suspension, 3550lbs Full Exhaust-- 9.70's@135
66 GTO (Retired race car)
421 CID
Multiple NSCA/NMCA World Champion
66 GTO 389 3x2, 4 speed, 3.90 gear, Montero Red 33K original Miles
67 GTO 2dr Post, 428, Tri Power, 3.55 Gears
80 Trans Am Black SE Y84 W72 WS6
Last edited by Mike Davis; 10-18-2021 at 09:01 AM.
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