whats up my 1974 260z s acting funny when i drive for a while(5-10 miles)
it gets real hard to shift and wont let me shift in reverse unless i turn the car off first i just bought it and its been sitting for 3 years

one more question i gave it a oil change and changed the plugs and up gas treatment in it. is there any thing else i should add in the fuel tank or the oil? heres one pic