Blue pill or red pill = 675 or 920
I bet most folks will argue that the 920 heads are better, because they are closed chamber heads. I think they'd be great from what I read!
Here's the deal, though: I just picked up these 675 heads from a FABO member last Sunday (in exchange for a bottle of Jack Daniels). They were rebuilt 5,000 miles ago with new stock valves and springs. I should be able to bolt these on and go. I got the 920s in a package deal when I bought the transmission that's in the car right now a couple of years ago. I thought they were pretty rough and just put them on a shelf. Well, I just started cleaning them up a bit and turns out they aren't that bad. The bad is that two valves are missing on one head and the other has a broken valve. The good is that none of the valves are stuck, there is no pitting and they should clean up nicely. Here's the real question, though: I want to keep it as cheap as possible. As far as I know the 675 and the 920 both have 1.5 intake and 1.78 exhaust valves. Can I just put new valve seals on the 920 heads and swap the valves and springs from the 675s to the 920s? Is that a bad idea?
:rofl:
Anyways, this is what they're for: My '65 Barracuda that I recently swapped this '69 318 in. Currently it has 163 heads (mid-seventies to mid-eighties smog heads?) and they are not great. Not sure what condition the valves are in, but there's some rough pitting around the water ports and one of the exhaust studs has a heli coil that I've replaced a few times, but it might start leaking again. According to the seller it's a stock block with stock pistons and cam. It doesn't smoke, so bottom end seems in ok shape?! Edelbrock Performer intake and 1406 carb. Stock manifolds, TTi 2 1/2" dual exhaust, A904 with stock converter, 7.25" sure grip with 2.76 gears, 225/65R15 tires.
The car was my daily driver for 13 years with a slant 6 and now now that I got most things tweaked on the small block, I'm back to driving it every day. Is it really necessary to swap the heads? Will it make a significant difference? I don't plan on racing the car. I just like to tinker and figure things out. I've never swapped or rebuilt heads before. I like a good challenge, haha. I think I should start by getting a spring compressor and take the valves out of the 920 heads, so I can inspect them better. Thoughts?
I bet most folks will argue that the 920 heads are better, because they are closed chamber heads. I think they'd be great from what I read!
Here's the deal, though: I just picked up these 675 heads from a FABO member last Sunday (in exchange for a bottle of Jack Daniels). They were rebuilt 5,000 miles ago with new stock valves and springs. I should be able to bolt these on and go. I got the 920s in a package deal when I bought the transmission that's in the car right now a couple of years ago. I thought they were pretty rough and just put them on a shelf. Well, I just started cleaning them up a bit and turns out they aren't that bad. The bad is that two valves are missing on one head and the other has a broken valve. The good is that none of the valves are stuck, there is no pitting and they should clean up nicely. Here's the real question, though: I want to keep it as cheap as possible. As far as I know the 675 and the 920 both have 1.5 intake and 1.78 exhaust valves. Can I just put new valve seals on the 920 heads and swap the valves and springs from the 675s to the 920s? Is that a bad idea?
:rofl:
Anyways, this is what they're for: My '65 Barracuda that I recently swapped this '69 318 in. Currently it has 163 heads (mid-seventies to mid-eighties smog heads?) and they are not great. Not sure what condition the valves are in, but there's some rough pitting around the water ports and one of the exhaust studs has a heli coil that I've replaced a few times, but it might start leaking again. According to the seller it's a stock block with stock pistons and cam. It doesn't smoke, so bottom end seems in ok shape?! Edelbrock Performer intake and 1406 carb. Stock manifolds, TTi 2 1/2" dual exhaust, A904 with stock converter, 7.25" sure grip with 2.76 gears, 225/65R15 tires.
The car was my daily driver for 13 years with a slant 6 and now now that I got most things tweaked on the small block, I'm back to driving it every day. Is it really necessary to swap the heads? Will it make a significant difference? I don't plan on racing the car. I just like to tinker and figure things out. I've never swapped or rebuilt heads before. I like a good challenge, haha. I think I should start by getting a spring compressor and take the valves out of the 920 heads, so I can inspect them better. Thoughts?