some qestions about my hatch

ffirst of all, i got my hatch while trade and fail the emission test here in virginia. its b16 ls swapped and pretty modified, all motor. it has s200 hondata. 1993 hatch. i got it while trading my car. its fun to drive Around but i face some technical issue here and there. got typr r tranny but 5th gear used to pop off diriving for more than certain time but after the fluid change it did okay. but the gear ratios is way toooooo short i had to run 4k rpm at 5th gear running 55miles.i want to know what tranny is tight and run strong. and time to time it has weird idle goes upto 2500rpm down to low rpm that sometimes turns off the engine so i had to keep giving gas to keep the rpm high enough so it wont stop. and the hatch has quick releasing sparco steering wheel and when i hit the turn signal, it wont stop automatic so i have to move signal light off with my hand. which part do j have to get to make it work again? and my interior just rattles real loud likely plastic parts are about to fall apart. is there any website has information how to kill interior noise?
thanx for reading and it would be great to get a help from someone who loves and knows well about eg hatch.
thanx for reading and it would be great to get a help from someone who loves and knows well about eg hatch.