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Original Message
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| RE: 69 mustang sportsroof with 390 4v |
| By Mel Clark - 08/18/2001 12:43:45 PM; IP 64.12.103.166 |
| I think it would be a nice project as long as it is nearly all there. There were not very many of this variation made, if memory serves. The 390 is a surprisingly strong engine that will perform very well with only minor modification. Such as a C8AX-C hydraulic cam, 3.70/3.90/4.10 rear gears with traction lock and a slight increase in compression by milling the heads. Ford says that the engine had 10.5 to1 compression but it was very rarely that, usually about 9 or 9.5 to 1. In case you didn't know it, compression is the key to horsepower but you want to keep it at a level that you can still run pump gas. the last thing I would add is an under drive pully set, especially if the car has A/C. I would use the stock exhaust manifolds as headers, while looking and performing nice, can be a PIA with leaks and installation problems as well as ground clearance and eventual rust. |
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