trans swap speedo question

[Rustbucket]

I've got a 91 blazer with 700r4 with an np241 xcase in it now. I'm 1/2 way through 3/4 ton axle swap and at the same time I'm putting in a 4 speed w/205 xcase. My 241 has electonic speedo and my new one of course does not. I really don't care about knowing how fast I'm going, but I am worried about problems with the vss telling my engine I'm sitting still when I'm not. Are there going to be computer problems to worry about or am I just worrying for nothing? Thanks for any feed back.

 

[4X4HIGH]

You need the VSS, ask willyswanter about it. I know he recently installed a 205 in his rig and had to modify the reluctor ring so he could install it into his 205.