I have a b-body rear with dr diff offset brackets,qa1 shocks,new lower shock mounts,Espo 2 inch drop springs,489 center section,sure grip,391 Richmond gears..everything has less than 3 miles..center section was went thru 2 years ago and car has been pushed around since everything has been bought..it still has drum brakes...what do you guys think is a fair price for it all?thx for any input..