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Original Message
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| Yes, you can! |
| By Kevin - 03/27/2002 2:03:59 AM; IP 207.102.191.58 |
The difference between these engines was in both bore and stroke:
- The 352 has a 4.00" bore, and a 3.50" stroke.
- The 390 has a 4.05" bore, and a 3.78" stroke.
I don't believe there's a 352 block out there that WON'T safely overbore the .050" to 390 bore size (Ford did it to make the 360 light truck engine - 4.05" x 3.50"). Many will go out considerably larger in bore too, some all the way to the 406 engine's 4.130" standard size.
After boring, all that remains is to a) install the longer stroke 390 crank, which has identical main and rod bearing journal diameters, and b) replace the slightly longer (but lighter duty) 352 connecting rods with those from a 390 or larger FE. It's a 'drop in'!
If your ambitions are for even more displacement, you can again follow the factory's lead. Install a 410 (Mercury) or 428 Ford crankshaft, with its 3.984" stroke. This gets you 410 cubes at standard 390 bore size, and there are aftermarket replacement pistons readily available.
However, since the 410 and 428 were 'externally' balanced, you'd want the appropriate flexplate or flywheel that goes with those cranks, to keep everything happy. |
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