87 5.0 mustang engine or tranny clicks when put in a higher gear.

[Haav]

Started happening a month ago.Friends have told me that I'm using bad gas and others say its something in my tranny. Also it's a 5 sod manual. What can I do to fix this prob?
And now that it's summer here in Florida I've notice it's not as fast on hot days even with 275 slicks! But u can feel the g force in gears 1-3 on cooler days.

Upgrades:
Ported heads
Timing slightly advanced
Aluminum fly wheel
Light weight racing driveshaft
Small racing cam
24lb injectors
Maf conversion
Bbk longtube headers
Aftermarket h pipe
Flowmaster 40s with dumped exhaust
16" Weld draglites w/big rear slick tires (275's)
Stage 3 clutch
Short shifter
Stock rear gears of an 87 stang I think 295

[2300turboford]

Compresion ratio?

[Storm13_5.0]

I've always heard that hot air isn't as efficient so it wouldn't let the fuel burn as well as cold air .. I may be wrong

[90GTNovi2000]

Well put your timing back to stock while continuing to run the same fuel. If the ping goes away it was the valves if not then its prob the trans.. When does it happen?

---------- Post added at 09:34 AM ---------- Previous post was at 09:32 AM ----------

It could also be a throw out bearing possibly.. A syncro could also be starting to wear out or just the clutch cable binding on something.. Just turn the radio off and cruise on it easy and figure out exactly when it is happening and we may be able to further help you fix the noise

[Haav]

Originally Posted by 90GTNovi2000

Well put your timing back to stock while continuing to run the same fuel. If the ping goes away it was the valves if not then its prob the trans.. When does it happen?

---------- Post added at 09:34 AM ---------- Previous post was at 09:32 AM ----------

It could also be a throw out bearing possibly.. A syncro could also be starting to wear out or just the clutch cable binding on something.. Just turn the radio off and cruise on it easy and figure out exactly when it is happening and we may be able to further help you fix the noise

Well , it happens when I give it gas. If I put the timing back with the same fuel and it's the valves, would I need to replace them? Nice builds too bro.