[brainsboy]

Mr Fixit, My specialty is with the 302 and 351, they are the reason I am on this planet, with out them I prefer death. I have been building them since I was 17, In the past I have had these motors in my dishwasher, oven, sink, bathtub, ect, I have had these motors everywhere. I eat, breath, and live by the ford small block, but Instead of rambling on about my qualifications and experience, lets use some logic. Lets assume I am 100% wrong for the time being. so lets go back to the original question.

"" As you know stock 351w rod lenght 5.956.I want use 6.200 lenght Lunati sportsman h beam rods with Lunati special order pistons.There any advantages of using 6.200 lenght rods?""

Are there any advantages.. sure #1, you just spent 233.33$ per 1HP #2 you have a nice set of pretty bullet proof rods, #3 your pistons are much shorter and will wear more due to the short skirts. #4 rings are now so close to the deck height you will have ring failure. #5 i almost forgot now you have a nice rod ratio to brag about

The logic point, why not spend this money on something more productive like head porting, or the difference between iron heads and going to aluminum. I have customers come to me all day long with the same problems. I had a customer come to me and say he bought a set of aluminum rods from BME and they claim he can run all day long under 6K rpm with out a problem in a street car, great, maybe so, but he has to buy a scat crank with a chevy 2.1 journal, then his rods are the old 327 2.0" so we need to turn the crank .010, now we have 9.27 rod pin, so new custom pistons, now we have aluminum rods that are thick as rat on steroids, so we have to clear the rod throws on the block which may not even clear with the 426ci.

MY point is keep it simple. Going through all the hassel of changing everying just for a 6.2 rod length is not worth it. Your wasting your money. If your writting a book, or just out to do test motors then great go for it. Or if you want a motor that no man has done before do it. The average person who wants to do a budget motor or have something that will last, stick to the basics, dont reinvent the wheel. I cant see doing all this work just to change to a 6.2 rod length.