 Complete the following phrase:  In testing, Graham Hill found the Lotus 49 easy to drive and responsive, but the power of the Ford engine difficult to handle at first. The V8 would give sudden bursts of power that Hill had reservations about. After his first run in the car, he said in typical witty fashion, Its got some poke! Not a bad old tool. However, Jim Clark won its debut race at Zandvoort with ease and took another three wins during the season, but early unreliability with the DFV ended his championship hopes. It had problems in its first race for Hill, and it had spark plug trouble at the Belgian Grand Prix, held on the 8.76 mile 14.73 kilometer Spa-Francorchamps. Clark and Hill fell victim to its reliability issues at the 