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1974.5 260Z ATLAS build


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On 11/9/2025 at 11:10 AM, NewZed said:

I'm sure that you've considered it and I don't know what you would do to cure it if it is a problem but those engine mounts are very long lever arms.

 

What happens if you grab the top of the engine and pull it side to side?  Probably best to test it now than to wait.  Even the mass of the engine in a turn will place a lot of force on them.

 

Just something that grabs the eye from the pictures.  Unusual engine mounting.

 

Edit - fore and aft also.  Much lifting force on the rear mount under braking.  Fatiguing of the front crossmember engine mounting points might be a problem.  It wasn't designed for that type of twisting force.  And you've moved the elastic portion up to the engine at the top of the lever arm.  The attachment to the crossmember is all metal.

 

Hate to be a Debby Downer but you have access now to work on it, rather than later. 

 

well, the factory motor mount for the L series six is a solid design with a rubber pad on the bottom.  I have poly bushings where the engine mounts attach to the arms coming from the crossmember.  The arms are made of 3/16" steel, very thick and heavy and professionally welded.  In short they won't break, and they won't bend.   Twisting forces, I guess that could be an issue down the road, but if it is present, then regardless of what style is used it would be present.  the style used is one that is currently used by a ton of guys running LS powered cars.  If you can grab this engine at the top and pull on it, and bend those 3/16" steel plates you have balls of cast iron.  In fact I would be seriously willing to wager $1,000 that you could not do so.  You could take these out, put one of them on its side and stand on it and it wouldn't bend.   I will allow that something could go wrong.....I'll address it when it does.  I appreciate the points to ponder though.  Cheers.

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Did you grab the engine and see if it moves?  That's all I was suggesting.  Trust (your ideas).  But verify (that they work).

 

“Give me a lever long enough and a fulcrum on which to place it, and I shall move the world. ”

 Archimedes

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I had a couple hours this morning, so I went ahead and worked some more on the layout for my brake master cylinder backing plate, and then installed my brake "parts", that divert fluid to all 4 wheels (I don't know what to call them).  I used Finishing Lines for the hoses.  These hoses are the new PFTE hoses that do not swell, etc.  Guys are completely running brake lines in whole cars with these and they work great!  I will be doing a combo of hard lines and this.  Everything past the firewall back is the stock stuff.  www.finishing-lines.com.  They advertise a lot of Honda stuff, but they DO have our 10mm fittings etc.  Great people to work with.  I then went ahead and pulled the back window as part of gutting the rusty hatch out and then installing my new hatch I got form Resurrected Classics.  My hood is at the sandblasters right now, should pick it up tomorrow, and then I can cut the hole and repair the spear with all metal filler a tad, as I can see some mud in it.  Seriously thinking about having the hood and the deck lid powder coated gloss black to contrast the light blue metallic.  Black spoiler and air dam also (they are already black, I can put a coat or two of 2K clear on them), I have glossy black flares........I will attach a pic that a guy did this with..... but the car is red.....it is giving me these ideas.  Pics follow, Cheers!

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