I just read on this eBay car (http://cgi.ebay.com/ebaymotors/aw-cgi/ebayISAPI.dll?ViewItem&item=599787611&r=0&t=0) that it runs a transmission from a 300ZX on an L-28 motor. Didn't realize these fit. Is this right, and if so, what gear ratio advantage/disadvantage would they have over a 280ZX tranny? Are they the same length/size?