aziza z Posted May 7, 2007 Share Posted May 7, 2007 Sent my order to john the other day because my ls1 swap is finally under way. We've been shooting emails back and forth and he asked me some questions that i cant really awnser because the car is not at my house (tried to search but came up with nothing). hopefully someone knows this and can help me asap so i can get back to him. heres his email questions Crossmember - 2 bolts securing it to the body are parallel to the ground and fit in 4 ears that protrude from the tunnel ? - -------- Differential flange 8 or 10 mm bolts Pattern is square or rectangular? Pilot diameter is 50 mm or 57 mm ( this is the recess in the flange that the driveshaft fits into) thanks John The car is a stock 5/75 280z with the stock r200 3.54 diff by the way. Quote Link to comment Share on other sites More sharing options...
Dudeboy Posted May 8, 2007 Share Posted May 8, 2007 Aziza, JCI has two crossmember one for 240 z and the other for 280 Z. John needs know what flange size, bolt size and pilot size and distance from your LS1 tranny to your flange to make your driveshaft. Jags that run has pictures of the differential in the flange link on there website. If you have a 1975 280 Z, you may have the 10 mm bolt size PLease Please confirm !!!! Your trans tunnel should have two ears like my 280. Search for a thread by Evil C, he posted a picture of the Datsun 280 Z tranny crossmember. This is the information I sent JCI; My pilot diameter is 2 1/4 inches The bolt circle is diameter is 2 3/4 inches. The bolt holes are 8 mm. My driveshaft measurement is 24 1/2 inches. Jags that run has pictures of the differential in the flange link on there website. If you have a 1975 280 Z, you may have the 10 mm bolt size PLease Please confirm !!!! Your trans tunnel should have two ears like my 280. I just received my drive shaft and it fits fine, my only concern is aprox 3/4 to 1 inch of yoke is visible, which my hot-rod buddies say that is o.k. Quote Link to comment Share on other sites More sharing options...
Dudeboy Posted May 8, 2007 Share Posted May 8, 2007 If you have pulled the L28 engine/tranny, have someone take pictures of the flange. If you are not the original owner of your Z, you may want to verify what differential you have. Quote Link to comment Share on other sites More sharing options...
aziza z Posted May 8, 2007 Author Share Posted May 8, 2007 the thing is the motor is still in there (l28) and i am picking up the motor from a 2001 camaro ss in a week. Also i cant really get to the car right now. Would it be safe to give him the same details as your car? were there any changes from 75 to 78 regarding the questions johns asking? Quote Link to comment Share on other sites More sharing options...
Slow_Old_Car Posted May 8, 2007 Share Posted May 8, 2007 i think the point everyone is making is that if you didn't own your car originally... there is a wild card factor at play as most of these cars have been around a long time among several owners. And as a result, parts may have changed, so verifying what is specifically on your own Z... is imperative. Quote Link to comment Share on other sites More sharing options...
m1noel Posted May 8, 2007 Share Posted May 8, 2007 It could be very expensive to send the info from someone else's car. You could be paying for parts that will not fit, then paying for the right ones. John needs the info from YOUR car. Some year Z's have different flanges, etc. Have the patience to order your parts only after you check this stuff all out. It will save you headaches in the long run. Mike Quote Link to comment Share on other sites More sharing options...
qwik240z Posted May 8, 2007 Share Posted May 8, 2007 When I ordered my stuff from JCI, I started with just the motor mounts and trans mount. Then I ordered the driveshaft and other stuff after I got the motor in the car. That way, I was able to take measurement and pictures to send to John. The trans mount he sent was for a 280Z so I actually had the trans held in place with a piece of rope tied around the bottom of the trans and around a 2x4 laid on top of the trans tunnel. Worked fine. Quote Link to comment Share on other sites More sharing options...
Dudeboy Posted May 9, 2007 Share Posted May 9, 2007 Like everyone has stated, once you pull the L28/tranny you will know what you have. At the very least, you need to find out what stock crossmember you have, so you can install the LS1/Tranny and have it in place; this is when John will need the flange information for making your driveshaft. Quote Link to comment Share on other sites More sharing options...
aziza z Posted May 9, 2007 Author Share Posted May 9, 2007 ok. i sent him an email asking to cancel the driveshaft order for now. I'll mount the ls1 then take mesurements and all that good stuff. Or i was thinking of getting a custom aluminum driveshaft made locally. idk. I will see after i get his response. Quote Link to comment Share on other sites More sharing options...
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