*Taken from Chevythunder.com (thank you!)*

Ok guys I'm seeing alot of TPI swap questions, so here we go, a quick guide

Typical set up for a 1986-89 MAF based system. Speed density is similar.


(A) Intake manifold.
(B) EGR valve
(C) EGR temp switch (maf only) (
D) PCV fitting, to the left is orifice for cold start injector (maf only)
(E) Thermostat housing neck and bolts
(F) Bolts needed for top plenum and runners- 13- M8x1.25x30mm, 2- M8x1.25x40mm, 4- M8x1.25x50mm, 1- M8x1.25x30mm throttle bracket stud, 20 total, these use a T40 torx head bit, NOTE these are metric. (
G) Fuel rail typical for a "F" body, maf system, fuel lines for Corvette is on opposite side. Look at picture, as this is a complete system
(H) cold start injector and fuel tube (maf only)
(J) Fuel injectors-8 total (
K) Intake runners, speed density will not have the cold start opening
(L).
(M) Intake air sensor
(P) Intake plenum, with throttle body, be sure to get complete throttle body with no missing upper and lower cover plates, bottom plate has provisions for IAC and coolant tubes.
(Q) Throttle bracket and bolts
(R) Vacuum fittings for fuel regulator, heater control and brake booster, speed density will have a fitting for MAP sensor and mounting boss.

Wiring/transmission/etc. gets complicated depending on your application *See link below*

You also have to swap fuel pumps to a high pressure TPI pump and replace all rubber connections to High Pressure Fuel Injection line.

www.chevythunder.com