A fabulous 40-car field will add another dimension to the regular British Touring Car Championship support programme at Snetterton over the weekend of 28/29 July, with round four of the Charterhouse Heritage GT Car Challenge. The 2007 season is proving to be the best yet for the Heritage GT series and the BTCC support races are among the highlights of a superb schedule of races. A capacity grid of racing GT and saloon cars from the 1960s and 1970s will do battle over a pair of races, with two drivers in many of the cars and compulsory pit stops adding to the excitement.The HGT cars are from an era when power exceeded grip, and with many cars running 4-litre, 5-litre and even 6-litre engines, oversteer is the norm in Heritage races. Add in the spectacle of rapid smaller cars trying to beat the bigger cars and the stage is set for two great racing to bring the curtain down at the end of Saturday and Sunday. The field includes at least four former BTCC racers, as well as the type of cars that featured in the BTCC in the 1960s.Likely to be the absolute pacesetters are the Chevrolet Camaro of Peter Hall and multiple BTCC champion Andy Rouse and the Sunbeam Tiger of Jackie Cochrane/Stephen Colbert. The Tiger was dominant at Brands Hatch in April and will really be able to stretch its legs at Snetterton. Another Camaro in the very capable hands of Arthur Thurtle and Roger Bennington will also be a big contender.The rapid Morgan +8s are always strong in HGT races and it is Rick Lloyd who will head the Malvern onslaught, while a horde of quick Aston Martins pack the field. The thundering V8s of Chris Scragg/John Bussell and George Miller/Les Goble will be very quick, while the older DB5 of Ian McCallum/John Bussell will be right up there with the DB4s of Peter Wheeler/Ben Samuelson and Nichols King, who shares his car with former BTCC racer Phil Bennett. In the other classes, the stunning Jaguar E Type of Peter Lloyd/Rob Schirle and the famous Lotus 47 of Pat Thomas will head the mildly modified class in the face of a gaggle of quick Ford Escorts, while several quick Minis will take on Gordon Streeter's Ford Anglia and the Lotus Cortina of David Mountain/Graham Hathaway in the class for classic saloon cars.