Question Of Sport. The Grand National. Mystery Cache

This is another in my Question of Sport series to mark the forth coming event,you will need to solve the puzzle to find the final coordinates.

The Grand National is a National Hunt horse race held annually at Aintree Racecourse in Liverpool, England. First run officially in1839, it is a handicap steeplechase over 4 miles 3½ furlongs (7,141 m) with horses jumping 30 fences over two circuits.^[2] It is the most valuable jump race in Europe, with a prize fund of £1 million in 2014.^[3]

The course over which the race is run – Aintree's National Course – is uniquely challenging, featuring much larger fences than those found on conventional National Hunt tracks. Many of these fences, including Becher's Brook, The Chair and the Canal Turn, have become famous in their own right.^[4] These, combined with the distance of the event, create what has been called "the ultimate test of horse and rider"

Solve the following

Goerge Stevens won five Nationals in which year did he ride Emblematic to victory. ABCD.

The ryder of Dont Push It was born in this year. EFGH.

Fred Rimell trained the winner how many times. J

In which year did Discount win the race. KLMN.

Fred Winters last win as a jockey in the National was in. PQRS.

Find cache at  N 50 DC.GF[B-A]  W 003 SR.MN[J-K]

Good luck.

You can check your answers for this puzzle on GeoChecker.com.