1988 tbi 350 pulled distr out to find marks are gone! Now what?

Retime it. Put #1 cylinder at TDC of compression stroke. Pull number one spark plug: with finger over hole turn the crank with a socket and feel for the pressure buildup as engine turns. When you feel pressure, that means number one piston is rising on it's compression stroke. Now turn the crank on around until it is lining up the zero mark on the pointer scale. TDC of compression stroke.
Now put the distributor in so that the rotor when installed is pointing to the number one spark plug tower. Distributor shaft will turn slightly as it is installed, so start with shaft and rotor turned a bit back, so when slides into position, rotor is pointing directly to #1 plug tower. Keep playing with it until you get it right.
Good luck.

a full decking of heads, as well as refurbishing at a head shop is most likely necessary, new head bolts, head gaskets, as well as checking the valve/piston clearance.make sure the coolant holes are properly cleaned out, and this could be a good time to port and polish the heads

E.C.M control injector pulsation, with key on check for voltage at injector harness, then reverse test light at battery and check for ground at the other wire at injector harness, crank engine ground should have pulsation if none bad E.C.M,good luck,hope this was very helpful.

Sits inside the throttle body, you would have to open to install regulator. Also check your fuel filter make sure it's not clog, fuel filter is under truck on fram rail, while your there do a fuel pressure test, with a fuel pressure tester, should have 13psi.

my injectors have no power ging to them. i just replaced fuel pump and relay. i have fuel going to my 350 tbi but nothing coming out the injectors. it wont start and i have no power at the injector so i dont know if its the ecm or what

Did you check the knock sensor located on the passenger side of the block, behind the starter, The sensor can be bad sending a signal to the Computer causing the computer to readjust the spark advanced timing causing Knocking and pinging....... or it could be as simple as bad gas. If you changed the timing chain, the gears should both be set with the the timing marks at 12 oclock for the 89 chevy K1500 5.7 350 V8 TBI OHV 16V if you set the timing at 12 oclock on the cam and 6 oclock for the valve and Distr. the number 6 is firing as number 1 you can recheck by bringing the No. 1 piston back up to TDC and check to see if your Distr. is pointing to the No. 1 Plug Hope this helps

most of the time all big hole wires go to the big post whitch would be battery an hot leads.the smaller wire sould go to the s post closer to the block. s stands for start.. GOOD LUCK

I thought the filter might be the issue here, on carb cars the engine tends to stall out with a plugged filter.

I know from Experience on Rebuilding my Chevelle www.PainlessWiring.com has everything that you need for this Conversion.

the throttle body used to get carboned up where the map senor passage is pull the vacuum hose off map and check vacuum if vacuum is not present remove throttle body nad clean passage