found the problem with my truck

The 390 in my 69 F-100 has always ran kinda weak and did not like to rev. I knew the fuel pump was weak so I got a new one. After I took it off my dad said see if you can move the timing chain. I stuck my finger in there and could move it about 1 or 2 inches.I can't believe it hasn't jumped time. I ordered a new one and it'll be here friday. It should run a lot stonger with a good timing set

 

yeah... 1 to 2 inches is quite a bit. Good luck on the swap.

 

good luck I bet the timing was everywere!

 

probaly was It got embarassing when a big block struggled to spin the tires. In theory fter the new timing set it should roast the back tires

 

yeah it should have no issues spinning the tires.I think thats all mine likes to do