Quote:
Originally Posted by WhiteV6
If you keep your 3400 upper and fuel rail/injectors with the 3500 heads and lower, its pretty much a drop on. The lower needs to be drill/tapped for the stock coolant temp location or use the 3500's setup in the rear head and use an extension for the sensor plug. I still have to make the extensions if I go that route officially but for now I plug the rear head and drill/tap the lower.
Compression tester is your friend.
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yeah, extension sounds decent, do they have a pigtail to pigtail connector?