4.2 stroker

I have read about all the various stroker combos. I know that the 393 is the easiest and cheapest to do. I need max stroke for my 351W in my truck to pull a 3500 pounds trailer around town. I am going to do the 400M crank deal. I can get a lot of machine work done for free, along with the balancing of the entire assy. I realize that at 4.2, I will have some clearance problems to deal with. I plan on using a chevy 6.0 rod and 351 piston of the proper compression ht. I figure about a .022 cut, to gain zero deck. With a .030 overbore, I should have 425 cubes, or about 70 cubes in stroke over the stock 351.
I realize that I can buy a 4.17 Scat crank, but at over $600, I think I can do the 400M crank cheaper. Since I will not turn this motor beyond 4000 rpm, I see no reason for a forged crank. I gues I am asking if anyone has done such a project. If so, let me know what you came up against. If not then stay tuned. I will post my results, good or bad, pass or fail, on here for all to praise or laugh at me. Hope to hear from someone soon..............Rod

You could buy a Scat cast steel crank with a 4 inch stroke for pretty cheap. Under $300. Or a whole kit with forged pistons for around $1000. That'll handle alot of HP. But, well built 351w will handle it. A 408w (4" stroke) will help alot. At some point reliability becomes an issue. Don't forget to figure your compression ratio. You will need either big chambers, or a big dish to build a towing motor. A zero decked 408w with a 63cc chamber is 12.7:1, and a 425 will be 13.3:1. Play around with the compression calculator on the tech page.

I used to tow my camper with a 240 I-6. It weighed about 4000lbs. It was a dog, but it got the job done. People have been towing a lot more than 3500lbs with bone stock 351w's for years.
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