I heard the same issues with the E-head and other offering when they first came out, and time have proven it was isolated cases.
The Olds crowd has been doing the SpeedMaster heads for years, no issues.
If you want to take a 'safe' approach, wait some time while the production line works out kinks, and you will be fine.
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1970 GTO Judge Tribute Pro-Tour Project 535 IA2
http://forums.maxperformanceinc.com/...d.php?t=760624
1971 Trans Am 463, 315cfm E-head Sniper XFlow EFI, TKO600 extreme, 9", GW suspension, Baer brakes, pro tour car
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