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Original Message
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| RE: 428 Engine I.D. |
| By Dave Shoe - 08/12/2000 2:18:46 PM; IP 63.226.182.191 |
I seem to recall the CJ intake has "C8OE" cast into it (I'm not gonna check my garage to verify which yours is), so you've probably got a plain old emissions era "Equal Runner" (aka: "S") intake on your hands or else an emissions era "Low Riser" (aka: "T") intake. Look on the top of the #1 runner for the casting identifier. There really were no other choices from 1968-on. I'm not fond of either intake, though both can surpass 400HP with little effort.
The CJ exhaust manifold WILL bolt up to 390 Fairl/Must-type heads, as long as you are willing to drill one extra hole in the top-rear of one of the heads (I forget which side), as stock 390 Fairl/Must-type heads have offset these upper-end holes down 1/4" or so. Drilling WILL cause the two holes to merge, forming a figure-8, so it's a bunch suckier to tap than it might seem. You might, instead, just run a clearance bolt in the new hole, and back it with a nut.
Also, CJ exh manifolds will port-match the low-exit ports of the 390 head, but the tiny 390 Fairl/Must exh manifold will NOT port match the high-exit ports of the CJ head.
If the motor is in the car, you obviously cannot drill that top-rear hole.
Good luck,
Shoe. |
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