427 SBF

So. I took out the rocker studs to clean them, and it appears they drilled into the intake runner. Good to know. Guessing I should use thread sealer. I would also guess those burrs add horsepower.

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Yah must have a set of hi ports, lol. That hole showed up on mine after porting.

I remember years ago hearing chevy was using the bottom of the studs to help direct flow in the nascar heads
 
eh....let's not turn this into a TOBT thread. My apologies Foxy.
 
Any suggestions here? I'll post the photo first:

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On the stock block I used a 1/4npt extension for the oil pressure sending unit. It had a dual outlet, one for oil pressure the other for low oil pressure idiot light (so I can kill the engine vs it killing the fuel pump and going lean)

The dart block is a 10an hole in that spot, not 1/4npt.

So, the only 1/4npt hole they put in the block is near the top, right under the water neck, and way too close to the block to attach anything with any girth (no homo) which is useless. Photo here:

20250708_215533.jpg

Any suggestions for how to adapt either of these or should I just re-make lines and wires to make it work with each hole?
 
I think I can get away with 10an orb to 1/8npt and then a shorter extension

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