KrisV Posted November 10, 2017 Share Posted November 10, 2017 I've been trolling this site since purchasing my 1970 Z 5 years ago, and this is going to sound like a total newbie post. I swear it's not, I'm just torn on which direction to go. The Z is currently getting a roll cage. It's due for completion in Jan/Feb, and I've been collecting parts. I have the rear diff from a 1990 300zx NA, and from a 1992 300zx TT. I also purchased 2 donor cars - a 1988 Mustang GT and a 2000 Trans Am. Before pulling the trigger on the rear diff conversion kit, I find my self going back and forth on which powertrain to use. Truthfully, I haven't ruled out building another hybrid z after this one is completed. For Road racing purposes, I'm just torn on which to go with. The 302 is already pretty well setup with the basic bolt ons (GT40 heads, comp cam, larger throttle body, etc) and I'm guessing the output for each will be comparable. The main purpose is to drive at SCCA events on various road coarses, so I'm hoping for some comparative feedback. Thanks for reading! Quote Link to comment Share on other sites More sharing options...
Neverdone Posted November 10, 2017 Share Posted November 10, 2017 Go with the lighter one. Quote Link to comment Share on other sites More sharing options...
KrisV Posted November 10, 2017 Author Share Posted November 10, 2017 THEYRE NEARLY THE SAME (450 VS 460 LBS) Quote Link to comment Share on other sites More sharing options...
SleeperZ Posted November 10, 2017 Share Posted November 10, 2017 Hmmm, Chevy vs. Ford. Sounds like fodder for an internet war... :0 Quote Link to comment Share on other sites More sharing options...
Neverdone Posted November 10, 2017 Share Posted November 10, 2017 Did you factor in transmission weight too? I know that T56 isn't exactly light. I'd go with whichever one will be cheaper. Factor in whichever one you can re-sell easiest and for the most amount of money too. Quote Link to comment Share on other sites More sharing options...
Greeko Posted November 10, 2017 Share Posted November 10, 2017 Drop an LS under the hood... Best bang for buck, reliability and awesomness! Quote Link to comment Share on other sites More sharing options...
KrisV Posted November 10, 2017 Author Share Posted November 10, 2017 The 5.0 project will definitely be cheaper since the donor car is manual and the TA is automatic - so I'd have to buy a t-56 magnum. I'm aiming for 400 whp, so I know both can make it happen. I'm just wondering what pros/cons some of the experienced track racers may have to suggest. Quote Link to comment Share on other sites More sharing options...
blu240z Posted November 10, 2017 Share Posted November 10, 2017 I would go with the newer engine, better technology and more parts availability imo Quote Link to comment Share on other sites More sharing options...
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