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Craig Porter · 12-29-2021, 06:11 PM

Most aftermarket P/G cases have 1/4 npt and use-6 coolant lines. If you want to use your -4 fittings you could use a brass step down adapter.Hope this helps

12-29-2021, 06:11 PM	#2
Craig Porter Junior Member Join Date: May 2021 Posts: 44 Likes: 0 Liked 83 Times in 24 Posts	Re: Powerglide Thread Size Most aftermarket P/G cases have 1/4 npt and use-6 coolant lines. If you want to use your -4 fittings you could use a brass step down adapter.Hope this helps