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Original Message
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| RE: 67 390 build |
| By galaxie390 - 12/19/2005 8:04:47 PM; IP 12.72.217.239 |
Bill,
At this level it would help to know a bit about the car:
Galaxie/Fairlane/Mustang?
C-6 or 4spd?
Rear? 3.25? 3.89? Posi?
Exhaust - (dual of course )
2.25"? 2.5? 3.0? Flowmasters? Dynomax?
Flat or Fairlane Manifolds? 428cj?
Headers? (Diam & Length)
ok, with all that I can even tell you what et and mph the car will run!
Now for those questions:
.520 lift is "iffy" on some valve springs - they may bounce but more than that they may bind or break - check carefully!
Piston-to-valve probably fine but check it (you can do it even with the heads still on)
Sure - if you want to do the heads, put in 209x166 (CJ) valves, hog out the bowls accordingly, clean up the tops of the runners - now you very nearly have CJ heads - worth about 20hp.
OK, now you have $500 in iron heads.
Add $400 or so for a 428 crank and now you will be in the 400hp range.
Or you could spend $1300 on the Edelbrock heads, pick up about 60hp (40 more than the CJ) and lose 50lbs too - and make over 400hp even on the 390.
Right about now you gotta lose that little Edelbrock intake and get a Perf RPM or a c7ae Police intake or a repro.
A 650 Holley will now be too small, use 735-780 cfm but 650 is "passable".
With everything I just said you now want a bigger cam, say the old 427-4v cam which is about like the Comp 270S - even the Comp 282S is ok in a fairlane/mustang.
If you do all this and have a bored 390 with 428 crank (about 417-421 inches) you will make near 450hp, and it will be as streetable as the 429scj or the 427-4v of old. I wouldnt turn it over 5500 or so, just to be safe.
Tell me about the car and I'll tell you what it will make and run. Good luck
Yes, I was born in Ford country, my dad built many a 427 Galaxie off the assembly line - I grew up with the "FE"
galaxie390 |
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