which year of two fourty is better with a sr20det 89 or 92? and is there any gauges that i can use in a 240 that go about 115 and 120??!?!?!?

 

please search next time before asking a question, both have been covered before, but I guess I'm in a good mood so I'll answer. Both cars are perfect for the swap, but with the '89 you will need a tach from a '91-'94 DOHC due to the '89's tach being calibrated for the SOHC engine. For your gauge question, there is a 180mph speedo at lsauto.com

 

Not to mention you'll need PS lines from a DOHC.