360 rods in 318 block

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Re: 360 rods in 318 block [Re: TheBlueBeast] #1181898 02/19/12 11:41 AM 02/19/12 11:41 AM
Joined: May 2003 Posts: 15,487 Florida S scratchnfotraction I Live Here
scratchnfotraction I Live Here S Joined: May 2003 Posts: 15,487 Florida	Quote: no. the 340 is the same stroke as the 318 but has a bore of just over 4 inches. You can not bore the 318 enough before you clear the cylinder wall. the 360 also has a larger journal on the rod than the 318 has on the crankshaft. IIRC And there is no way to make the rod fit properly onto the smaller diameter crankshaft. And no you can not destroke a 360 back down to a 340 with a 318 crankshaft. unless you want to spent lots and lots of money in research and development and machine work. IIRC..the main bearings are larger on the 360 crank,they both use the same rods. they did make main bearing spacers that would allow you to run a small main bearing 318 crank in the 360 block to destroke it. putting a 360 crank with the mains cut down to 318 size with a stock 318 bore will make a 346 cubic inch and with a .030 over bore and stroker pistons you get a 349 cubic inch. use of a 4" stroke crank in a 318/340 will get you 390/416 cubic inch stroker use of a 4" stroke crank in a 360 will get you 408 cubic inch stroker just boreing a 318 out .030 will get you a 323 cubic inch I am doing up a 349 roller cam stroker engine myself

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