I have a 85 fox body gt40p heads, carbed weiand stealth intake and long tube headers just something a little mild but I'm having trany problems I have a c4 trany with a tci 2500 converter and in first It'll start to spin at 1500 rmps but in reverse I have to rev up to 2500 rpms to get it to move but it will jerk real hard then move. What do y'all suggest?