383 big block builds, from mild to wild, I want to hear about them!!

This is back when me and my buddy knew every thing!!! and it shows.
68 Dart GT. came with a 360 that we put the 474/280 MP cam in it and shaved the heads.
ran good at the track.
He decided that he was going to putt a 383 big block in it. Fresh 30 over bore, steel crank, arp rod bolts, stock HEAVY ARSS STOCK PISTONS, and stock compression. closed chamber heads to get the compression up.:rolleyes: bought the MP porting templets and got out the die grinder. (Bigger is Better Right!):D
509 hyd cam, and a 2500 stall converter. (Some guy cut a stock 11 converter open and said it would stall 3000 rpm:rolleyes:)
oh and we cut the fenders out enough to install fender well headers............Why???? Because it was COOL Man:p

10/26/15 slick and the 3.91 pos from the previous 360 set up.

Took it out and raced down the track.....................You guessed it IT WAS A TOTAL DOG!!!!!!
Had a lot more MPH at the end of the track but ran almost the exact same ET.
We threw a bunch of different carb and and intake on it, but it just didn't run much if any better.

If i would have know all the things i know now, that 383 would have been a runner.
After a couple of years he lost interest in drag racing and got married.
It ran low 14s high 13s at 4400 foot elevation.

We took it down to sea level for a race. it had 410 gears in it now.
At the end of the run there was some smoke from the back end........................
He came back and said something is loose in the rear end.
After several more runs he figured out that it was getting loose because he was spinning his tire at the top end.
Soooooooooooo
We thru 3 third members and his tool box in the truck...........Problem solved.
Was that because that 383 really made some power?
Was it because at 118 mph there was just to much air under the car?
Or was there a bump at the end of the track................
We never found out as the next run it started knocking and lost oil pressure!

When we got home we found a push rod pushed through the stock Rocker arm shaft and a lifter NOT in its lifter bore.
Went to the wrecking yard and bought a couple push rods and a rocker shaft assemble and fix the problem.