'And how much wood could a Woodchuck chuck if a Woodchuck could chuck wood'????
I reposted the post I refered you to earlier and the List of Parts that would be required for the change to TPI for your engine.
Now for a change to carb on a '76 engine you would just need an Intake that would fit the Heads and the style of carb you were going to use. There are some great 'Package Deals' avaiable from most of the major speed retailers that would give you all the parts you need to do the change over.
There may be a few extra's you will need such as a Thermostat housing, Thermostat, PVC set-up,Heater hose fittings (if needed), maybe a new mount for the Throttle Cable and of course those 'little' things that always keep us finishing our project until the auto parts place opens the next morning.
Let us know if there are specifics as to the manifold, heads or carb. that you don't understand.
- Here is a past posts that discussed lots of the info you would need -
The list of parts required below came from this great site -
Parts you would need -
Q: What is needed to convert my engine to TPI fuel injection?
A: You'll need to find the following:
TPI plenum and runners
MAF sensor, intake hose, filter case
Injectors (19 lb/hr for 305, 22 lb/hr for a 350)
Oxygen sensor (if yours doesn't already have one)
Knock sensor (if yours doesn't already have one)
Intake air temp sensor (goes in plenum underside)
Coolant temperature sensor
Cold start injector sensor
Electronic Control Module (ECM or computer)
Re-route EGR and charcoal canister ported vacuum as per TPI setup
A/C bracket to TPI intake (upside-down U-shaped bracket)
The best (cheapest) way, is to find the parts through junkyards.
One last area of reading you will find great info on is -
Hope this info helps!