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my '74 smooth620

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smooth620 View Drop Down
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HAWK EYE

Joined: 20 Jan 2010
Location: By KuniaWalmart
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Post Options Post Options   Thanks (0) Thanks(0)   Quote smooth620 Quote  Post ReplyReply Direct Link To This Post Posted: 26 Mar 2015 at 7:28pm
Originally posted by EzCruiser EzCruiser wrote:

What are the specs of the u20 cam compared to the, oh.. let's say u67 stock cam?


Specs are almost the same as a 272 Crane cam but the base circle is slightly bigger. I can feel the difference when driving up a hill In 3rd gear, the Crane would still have a lot of torque but the U20 would feel almost as if it's in 4th gear.
Better to learn from other peoples mistakes than to make them yourself.-Anonymous

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HAWK EYE

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Post Options Post Options   Thanks (0) Thanks(0)   Quote smooth620 Quote  Post ReplyReply Direct Link To This Post Posted: 20 May 2015 at 10:32pm
Update: Did this headlight wiring upgrade a few days ago. Found some relays(thanks EZ but I still haven't found it) and dug up information(thanks Braden for the diagram). Info/install below is for a '73-'74 620 so yours may be a bit different. Otherwise, it's a big improvement in brightness. Used to be 9 volts at each headlight, now it gets 13 volts. And no hot fuse at the fuse block anymore.

Thanks to another 620 owner for posting this info:


Edited by smooth620 - 20 May 2015 at 11:05pm
Better to learn from other peoples mistakes than to make them yourself.-Anonymous

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HAWK EYE

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Post Options Post Options   Thanks (0) Thanks(0)   Quote smooth620 Quote  Post ReplyReply Direct Link To This Post Posted: 20 May 2015 at 10:37pm
Gather your parts and mark wires accordingly
Better to learn from other peoples mistakes than to make them yourself.-Anonymous

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HAWK EYE

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Post Options Post Options   Thanks (0) Thanks(0)   Quote smooth620 Quote  Post ReplyReply Direct Link To This Post Posted: 20 May 2015 at 10:43pm
Locate old relay. Clean wires and connections.


Mount relays and route wires. Heat shrink tubing protects connections. Install battery, start engine & check voltage at each headlight. Low beams should show 13 volts & highs should be 12.5v. When satisfied remove battery.


Edited by smooth620 - 21 May 2015 at 1:08am
Better to learn from other peoples mistakes than to make them yourself.-Anonymous

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HAWK EYE

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Post Options Post Options   Thanks (0) Thanks(0)   Quote smooth620 Quote  Post ReplyReply Direct Link To This Post Posted: 20 May 2015 at 10:52pm
To be sure it passes safety inspection (or smog check in some states) wrap wires in wire loom & electrical tape. Keeps it looking like factory. Nice & clean.



Better to learn from other peoples mistakes than to make them yourself.-Anonymous

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HAWK EYE

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Post Options Post Options   Thanks (0) Thanks(0)   Quote smooth620 Quote  Post ReplyReply Direct Link To This Post Posted: 31 Dec 2015 at 12:03am
While looking in a hardware dept I found these and since I already had my shift lever out I had a great idea





Pressed them in with a c-clamp and made sure the pin fit snug



If you have a short throw kit like this then I'd recommend re-tightening the brackets 1st before installing the shift lever.

Everything fits in snugly and feels like a brand new transmission. These are far better than plastic bushings.
Better to learn from other peoples mistakes than to make them yourself.-Anonymous

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Slickhead

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Post Options Post Options   Thanks (0) Thanks(0)   Quote Knottyhead Quote  Post ReplyReply Direct Link To This Post Posted: 02 Jan 2016 at 3:24pm
Good write up Smoothy!

Were ya get that shifter? I see how it shortens the throw with the bolt on extensions and the length from shifter pin to cup...........I do like and want one.
Still on the never ending quest to squeeze more from an L series
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HAWK EYE

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Post Options Post Options   Thanks (0) Thanks(0)   Quote smooth620 Quote  Post ReplyReply Direct Link To This Post Posted: 05 Jan 2016 at 1:59am
Thanks Knotty!
The Short throw kit came with the '83 280ZX 5spd transmission when I 1st got it. The shift lever has its pivot point moved up and it requires those custom brackets. With the new metal bushings it 'clicks' into gears, feels more solid.
Better to learn from other peoples mistakes than to make them yourself.-Anonymous

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