What all do these typically include? What are the difference in 331 and other sizes? What exactly does it do? How much for install/ how hard to do yourself?

 

"Stroking" a motor increases your displacement by increasing the distance the pistons travels in your cylinder bore. I believe most kits come with everything needed to do it. And I would not strongly recommend doing any internal work unless you are okay having your car being down for several months, or you really know what you're doing. Install prices would probably run about the same price as an engine rebuild so it may vary from area to area/ shop to shop. Best bet would be to call around and really do your homework. This isnt exactly a small mod....

 

heres a peice of advice to keep your in the shop for as short a time as possible: if you buy the stroker kit (a modified rotating assembly) make sure its fully forged so you can throw as much power at it as you want and more importantly: go ahead, spend the extra 600 bucks and buy a forged block to go with it. by buying a new block, your allowing the shop to build a short block which they can just swap into your car within a week. the only other option would involve them installing the stroker on your stock block wich would require your car be out of commission for months.

 

+1
That sounds like a good idea.

 

I've done a few stroker kits in my time and did not have my car down for months......however, there is a bit of expertise involved depending upon which kit you do. You may have to do some clearancing (read grinding on your block) for the longer rods and/or crank throw to have room for that new movement.

If you do not feel comfortable with this I would reccomend the short block avenue mentioned above.

Also some kits, especialy some 347 kits push the wrist pin slightly into the oil ring grove in the piston.... all things that need to be weighed

If you do it yourself just be CAREFUL...

Do alot of research...and choose wisely.

Basic law of physics....to get something, you gotta give something up...........