Help with first test drive issues


I took it on a 8 mile test run, had three issue's that I could use some advice on.
First the speedo isn't working now. Checked both ends are connected, will work more with this later.
Second, it appears to load up when you kick it down, might need to figure out the holley. Any ideas why it would load up?
Pops out of 4th gear when you kick it down. Would this be linkage on the tranny?
Thanks
Frank


