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Original Message
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| Forged steel crankshaft, also has |
| By mcj67 - 02/16/2001 3:12:17 PM; IP 12.78.122.83 |
Block is cast with reinforced main webs,
Also 64-78 has bosses for cross-bolted mains -partially- cast from 427 molds.
(I think that it only has the bosses cast in on one side so you can't set it up for cross bolt mains, you will see once the pan is off)
It may have heaver cylinder bore walls.
Connecting rods are 13/32"bolts /larger than std.390eng of 3/8"
Cyl. bore is 4.05" / Same as std. 390 bore.
Crankshaft is forged steel, stroke 3.79"/ std. 390stroke is3.784"
391 crankshaft can be milled to fit to a std. 390 block!
The snout has to be milled to 390 spec.
The flywheel flange has to be milled thinner to 390 spec.
The391main journal is 2.749" / The 390 main journal is 2.7488"
Someone will be able to explain the minute difference in the main journals. It may be that the FT used a thicker bearing?
There is only 2-10/1000 of an inch difference in them.
There is a bushing availibil so you can run regular 390 and aftermarket distributors in the 391 blocks.
If you just cut the flywheel end of the 391 crankshaft down to std. 390 spec. you can bolt this 391block up to regular car and light truck standard and automatic transmissions.
You got your hands on a poor mans CJ with the right heads cam and intake.Have Fun Mike Jones |
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