[capri 72 gt]

Hi Guys , I am having trouble with fuel vaporisation after running car. Engine starts first go when cold but after a run and switched off I have trouble restarting with occasional backfire from carb [weber 40dfav] you can actually hear fuel boiling in carb float bowl .car is fitted with electric fan and is not overheating ,motor runs very well ,timing is ok .run 98 octane with valvesaver.Have noticed that a lot of heat builds up under bonnet ,have thought about cutting vents in bonnet but reluctant to deface perfect bonnet .Any ideas .cheers