AZ Steve
Well-Known Member
Hi,
I’m looking to build a moderately performing 440, to do so I will need much better flow numbers than most stock heads will provide. Its to labor intensive and not efficient to port a set of 906`s or the 915`s I have, I am not a purest however I`d like the engine to appear somewhat stock. not all manifold and carb.
As everyone knows early B Bodies have hood clearance problems. I am specifically interested in the B body years of 1966-1967. I’ve got a 67 GTX and don’t want to cut the hood. Which means using max wedge heads isn’t really an option due to the height of the intake manifold`s. I don’t want to use dual carbs, so the cross ram isn’t an option either.
Here is what I am considering as a possible option to get the best bang for the buck. Most 440 engine heads have the same weak spot which is poorly designed exhaust ports, raising the port helps. But full CNC exhaust porting really is the ticket. According to all the DYNO simulations I have run the gain can be as much as 80 horsepower. while using a good flowing dual plane intake that is properly port matched (not gasket matched) to a good aftermarket head such as an INDY SR with a lightly touched as cast stock intake port, and a fully CNC raised exhaust port.
My question: has anyone ever done this and I`d like to hear suggestions you may have concerning horse power and hood clearance, as I said this issue is with a 1967 GTX.
I’m looking to build a moderately performing 440, to do so I will need much better flow numbers than most stock heads will provide. Its to labor intensive and not efficient to port a set of 906`s or the 915`s I have, I am not a purest however I`d like the engine to appear somewhat stock. not all manifold and carb.
As everyone knows early B Bodies have hood clearance problems. I am specifically interested in the B body years of 1966-1967. I’ve got a 67 GTX and don’t want to cut the hood. Which means using max wedge heads isn’t really an option due to the height of the intake manifold`s. I don’t want to use dual carbs, so the cross ram isn’t an option either.
Here is what I am considering as a possible option to get the best bang for the buck. Most 440 engine heads have the same weak spot which is poorly designed exhaust ports, raising the port helps. But full CNC exhaust porting really is the ticket. According to all the DYNO simulations I have run the gain can be as much as 80 horsepower. while using a good flowing dual plane intake that is properly port matched (not gasket matched) to a good aftermarket head such as an INDY SR with a lightly touched as cast stock intake port, and a fully CNC raised exhaust port.
My question: has anyone ever done this and I`d like to hear suggestions you may have concerning horse power and hood clearance, as I said this issue is with a 1967 GTX.
Last edited: