A pinging sound only under a load

I dnt know wht the specs were but it was tpdc and it started to die when he moved the distubor no I hvnt yet could it be the maf sensor

Ok, so you're not sure about the timing then, do you know what motor is in it by chance? I look up the specs. For it. But the only way to come close with out a timing light is by ear, remember I told you. You have to break torque it a little, put the motor under load and adjust the distributor until the ping goes away, if the motor dies you turned it the wrong way.
RE: MAF or Mas air flow sensor, it's hard to say, but not likey you didn't get any codes did you?

350 we timed it by ear mine doesnt store codes

Ok, got the specs for timing 4 degrees BTDC with an automatic trans. You really need to get the timing light or borrow one from some buddy if you can't time it by ear. You have to start here. Then go to the knock sensor because of the fuel.

Ok ty how can I tell if the knock sensor is bad

It can be checked with an ohms meter, I believe it's something like 800 to 1200 ohms you can call AP store they'll help you with specs. Too, if its close in that range it should be good. Most cases they are good, I never seen a bad one unless it's broken. They cost almost $40 not cheap.
I hope you don't have a bad ECM, you said it doesn't store codes?

Yes only 91 and up thts wht I read on it ecm is that in the distubor

No the ECM is inside the truck on the OBD 1 systems, should behind the glove box or some GM's put them on the driver side above the E-brake. The ICM or Ignition Control Module is in the distributor.
The ECM is the main computer Engine Control Module. That is the unit that stores the codes. OBD 1 or On Board Diagnostic.

God I hope tht is not bad is it likely to just go out wht does a broken valve spring sound like just askin

Well if you exhaust all of the possibilities and nothing works then you replace the ECM. But most cases the ECM is good and holds out the life of the car/truck, but they need up graded, what I mean by that is the EPROM needs flashed to compensate for warn in motors for issues where say the CEL's keeps coming on because of issues where the EGR code keeps coming up because the system won't allow for an extra few seconds for the valve to open. "This May Not Be An Issue With Yours" But there is a chance yours may be bad for not storing codes "possible memory issue"

K I hope not

I cant aford a new one what does a bad valve spring sound like

Valve Spring? I guess you're referring to the head valve spring. I don't thing you have that issue, if the spring were bad/weak then the valve would stick open from time to time and either back fire or pop into the intake.
If that is what is happening you more than likely have the spark plug wires crossed.

K not that just rough idle and a little hestin and pinging only under a load its drvin me nutts

Work with what you have for now, grasping at straws is just a waste of time.
Work with the timing and knock sensor issue at hand and check to make sure the EGR Valve is working. The way to check it is to start the motor let it warn up fully, and rev the motor a little bit and see if the stem moves up and down through the slot on the side of the valve. Don’t put your finger through the slot to see if it moves or you will get burned "Very Hot".

I replaced the egr and the knock sensor hasnt been hooked up since I hve had it

Come on we have been over this, I know you just replaced the EGR Valve and the Knock Sensor has not been hooked up.
Hook up the Knock Sensor and check the "NEW" EGR Valve to make sure it's working.

K I will check tht 2mrrw the dam thing pisses me off ran fine till I filled up

Just a thought. Maybe just got a bad batch of cheaper gasoline? Since it didn't start until after the last fill up.

Thts wht im thinkn