ok maybe someone has done this before and can help me, i have an 87 iroc with a 305 tpi and a borg warner t-5 , i would like to drop in a 400 small block i have, and use the tpi setup, also would like to drop in a t-56 6 speed while im at it, what do i need to change? what will i be abe to use? any info will be greatly appreciated, thanks.

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87 IROC-z 305 TPI 5spd Borg warner 9-bolt 3.45 posi 4 wheel disc,8.8 Accel wires , bosch platinum +4 plugs,gutted air box,k&n oil filter,synthetic oil 10w30

 

First you gonna have to buy a centerforce flywheel part # 700173 for your 400 engine or if you want to use a stock type 93+ flywheel have you engine internally balance.If you don't want to have problem fitting the starter use a late type starter (smaller).You gonna have to buy (custom)or fabricate a new crossmember for the T56 , for your speedometer you will need something that will change the VSS signal from the tranny to mechanical ,http://www.abbott-tach.com/
you have to look under products for CableX that will do the job.The T56 master/slave cylinder won't fit to your clutch pedal stud and if you make it fit the pedal will be like 1 1/2" higher than the brake pedal so what I did is to weld a late model stud and changed the bracket position on the pedal.If you need more details let me know.

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1987 IROC w/T56 and a 383 TPI in the works