ok stroker guru's, gig this one

Here is a picture...shows the difference in skirt length and designs...

from the far left is a KB847 .....390 4.00 stroke ..3.94 bore disc stroked 318 1.47 CH
next is a KB107 360 3.58 stroke....4.03 bore flat top standard stroke 1.67 CH
next is a ProTru 408 4.00 stroke 4.03 bore disc stroked 360 1.47 CH
next is a wiseco 408 4.00 stroke..4.03 bore flat top...stroked 360 1.47 CH