franklin2
Well-Known Member
- Joined
- Dec 24, 2019
- Messages
- 3,424
- Reaction score
- 1,758
- Points
- 113
- Location
- Virginia
- Vehicle Year
- 1984
- Make / Model
- Bronco II
- Transmission
- Manual
If you could afford it, the aluminum heads would transform this engine. First off, Ford never put an adjustable valvetrain in their v8's, so it's always a can of worms when you put a aftermarket camshaft in place. Sometimes it works and the valve lash is ok, sometimes it doesn't work and you have to rig some shims or buy shorter pushrods.
To convert the original heads to make the valves adjustable is a lot of labor which is a lot of money. And then you still have the old cast iron heads. The aluminum heads will already have the guide plates and such to make the lash adjustable. And their combustion chamber design is better, along with the aluminum construction and better quench area. The factory heads are open chamber smog type heads. And the weight savings while minor, can make a difference also. I haven't checked on these particular heads, but the valves are probably larger also.
But this is leading to a fire breather. If you want to stay very mild, then stick with the stock stuff.
To convert the original heads to make the valves adjustable is a lot of labor which is a lot of money. And then you still have the old cast iron heads. The aluminum heads will already have the guide plates and such to make the lash adjustable. And their combustion chamber design is better, along with the aluminum construction and better quench area. The factory heads are open chamber smog type heads. And the weight savings while minor, can make a difference also. I haven't checked on these particular heads, but the valves are probably larger also.
But this is leading to a fire breather. If you want to stay very mild, then stick with the stock stuff.