​​​​Is it possible to have a longer stroke for a 351w without modifying the block? Or do i have to bore and grind

 

You do not have to bore the cylinders larger, but with all the trouble, why half a$$ the job?

I'm gathering parts for a 408 and that includes a 4.0 inch stroke crank. I know that needs some notching of the block. I think they make a 3.75 stroke crank and maybe you don't on that one.

The pistons are .03 over so a bore is required. With the amount of miles on this core engine, I'm not going to find stock sized pistons. New pistons and an old bore just sounds like a really bad idea.

 

That's fair i don't know it was just a question and i was wondering if it would help with torque since it'd be under square

 

I know in theory, a longer stroke means more torque, but also a larger bore does too. Basically, the bigger the engine, the more power/torque you are going to get.

My understanding that you can use the 5.0/302 pistons and with a certain crank, you can get a budget build. Just because I don't want to play with my truck, doesn't mean you do. Nothing wrong with a project that will scratch and itch you have. If the funds aren't there for a quality build, just understand you may have problems.

Just like being really hungry and buying a McDonald's hamburger. It might fill that void, but it's not a good idea.

 

I gotcha honestly I'm still on the fence as to wether or not I'm gonna do anything that deep to it so for now I'm just throwing ideas around in my head and fact checking myself

 

By the time the budget is broke, you’ll find you need to spend more money on machining and blue printing, might as well bought a stroker kit.

I think the only affordable budget crank would be from a 400m plus machining, then figure out rod length and pistons, what compression ratio.

https://www.motortrend.com/how-to/35...w-stroker-kit/

article is 20 years ago, probably won’t find exact parts unless it is a kit

 

Increased torque comes from the increased displacement. There is no torque advantage produced from a longer stroke vs a larger bore.

How much work the block needs really depends on your choice of rods and how much stroke you add. An engine like a 393 Windsor(3.85 stroke, 4.030 bore) using the stock Windsor rods and a piston intended for a 302 sometimes goes together with no block grinding. Sometimes it needs a little bit just depending on the style of the factory rod bolts. A 4inch stroke usually requires little to no grinding if it is built using the Scat 7/16 capscrew I beam rod which are about the best available when it comes to stroker clearance.

These engines are easy to build as a stroker because there is very little in the way. The cam is far from the crank centerline and the pan rails are wide and that gives you plenty of room.