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Post by spud on Oct 16, 2018 4:30:04 GMT -8
Ive heard stories about small valve 360s. The legend is they have good trail torque. Its probably getting late in history to find a set. Not that they aint on the planet, but finding some is like finding bigfoot. Search for years and find nothing. Quit looking and he kicks you in the ass and runs back into the trees😆
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Post by sc397 on Oct 16, 2018 4:52:52 GMT -8
Oh no.. Bigfoot will be much easier to find.
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Post by spud on Oct 16, 2018 13:11:38 GMT -8
All ya need is some jack links beef jerky
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Post by spud on Oct 17, 2018 8:26:13 GMT -8
Thanks for those pics Rick. Studying photos of mopar and chevy “swirl port” heads it appears to be much copying of what amc may have pioneered in 78 and 79. Bold statement? Presumptuous? I dunno but amc had iron on the production line before the big 3 with swirl enhancement. Not like swirl, quench or tumble are new ideas, but it appears to have a newer more porposefull focus at that point. Its still a primary design directive. But swirl intake ports apparantly have been rethought into more generally efficient intake ports with more swirl inducing fearures in the combustion chambers. Vortec evolutionary changes highlite this trend... but anyways those photos give me ideas. Not sure how durable epoxy is on a daily driver. It doesnt appear to be a problem in a race car, but they dont reall last to long before they need work. Thats my big question now. How long will epoxy last in an intake port?
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Post by spud on Jan 19, 2019 13:06:44 GMT -8
Hmmm ... if i have heads with 3233324-2 casting numbers... like the swirl port heads in those pictures, like are they for sure swirl port? Or should i take off the intake and look at the intake ports to confirm?
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Post by spud on Jan 19, 2019 15:26:39 GMT -8
Couldnt take the suspense and pulled the intake... regular intake ports.
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Post by sc397 on Jan 19, 2019 16:40:22 GMT -8
How does it look inside?
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Post by spud on Jan 19, 2019 18:45:57 GMT -8
Looks pretty good inside. 😁
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Post by hurst390 on Jan 20, 2019 4:48:15 GMT -8
How long will epoxy last in an intake port? If you clean up the port best you can then wipe it down with Wesleys bleach white. It etches the metal and sticks the epoxy. been doing it for years. I ported some Pontiac heads for an engine I built my brother (street car). I ended up with a hole on a pushrod pinch area. Epoxy has stayed in for 20 years. How do I know its still there? The first repair I used devcon and it didn't last. He could tell something happened, it idled high and you could feel the vacuum at the oil cap(710) fill hole in the v.c.
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Post by spud on Jan 29, 2019 9:33:26 GMT -8
What kind of epoxy did you use? What im thinking about doing is adding epoxy to a regular intake port to simulate what amc did in the swirl port heads. I can see the majority of change was to minimize flow to the inside of the bowl,(side closest to ex valve) by filling the sweeping curved area into a “ corner” that closes off flow from filling the inside bowl area, directing more flow to the “ outside” area...
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Post by hurst390 on Jan 30, 2019 5:41:20 GMT -8
Permatex 21425 Fast Cure Epoxy
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Post by sc397 on Aug 20, 2019 4:18:13 GMT -8
Stickshifter made me buy another 304 and a couple of 360's from him.. Now I have (2) 304's and I can't even tell you how many 360's again. I think I might build one of the 304's up for a CJ guy so that it can set there for years before someone wants it. LOL! Plus..I have those stupid high compression 290 pistons... and, that de-sroked 390 crank (3.40"). The problem is finding a connecting rod that would work with those pistons and the crank.
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Post by spud on Aug 20, 2019 6:50:33 GMT -8
Wanna sell the crank? And what details do you know about the 290 pistons? Pin size is stock? Pin heigth is stock? Are they 4 barrel 290 pistons? Are they cast? Got any pictures? Would you like fries with that? 😊
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Post by sc397 on Aug 20, 2019 7:40:46 GMT -8
The piston is the forged +.030" piston on the right. it has the stock pin size. The crank is a 1970 390 crank ground by Moldex to a 3.40" stroke. -.020" on the mains and std 2" chevy rod journals. The flange is machined for a 904/727 flex plate. I would have to have a 401 crank as a core and a pile of money for the machining and hardening.
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Post by spud on Aug 20, 2019 9:39:51 GMT -8
Oh ok. HoW big a pile of money ?and those forged pistons do have a healthy ( like maybe too healthy) dome on them. What about the stock 290 piston in the middle. Got any extra sets of those?
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