Got my 4.8 and nv3500 in my 2wd 95 rcsb. Got the what I belevie to be the correct fly wheel. Its the orylies nfw1050. First starter would spin, but not engage the flywheel. Went to the junk yard and got another starter. Bolted it up and tried to start it and all it does is grind. So I'm lost. Any one have any ideals of what to try next?