911 guage connecting-help!

[gd2bwise]

Hi

Was wondering if i could get some help? have replaced my 912 with a 71 911t engine, the guage are still the same -67 green back, fuel is connected only so far. Question is will the oil temp, tacho, speedo hook up? or will it need new senders etc?? or even yet new everything- tacho, speedo etc. I know that the redline is 6 instead of 7 which i should change, but i just need to know what will hook up and work and what wont with what was originally there.
Any pro or backyard experience is appreciated!

Thanks!