Heater hose nipple 3671918Z 4BBL intake Selection problems

[SRKlegin]

Good evening,

 

[SRKlegin]

Well here's the problem. Its a 3671918Z 73 340 nipple. I have bought a set from mancini's same problem. Bought yet another from classic industries, too big...can't find that sweet spot. O.D is .631 and another measurement using thread pitch is .591. Can any help finish my intake?

 

[SRKlegin]

Good evening,
View attachment 136592

View attachment 136591

Well here's the problem. Its a 3671918Z 73 340 nipple. I have bought a set from mancini's same problem. Bought yet another from classic industries, too big...can't find that sweet spot. O.D is .631 and another measurement using thread pitch is .591. Can any help finish my intake?

 

[Mopar Nut]

I searched and this is all I come up with not my information. “1/2" npt on the water pump, 3/8 npt on the heater hose”.

If I was you, I would run your manifold down to Ace Hardware down 5600 W. in Roy. Take it inside and check the thread size with one of their examples.