quote sprocketman:

    Thanks for that.
    That sounds a good idea but I am concerned that the drop base air cleaner will actually reduce the air flow, which is an important consideration on a modified engine.
    Is my assumption correct or not?
    Can you advise any particular makes/models/part numbers for drop base air cleaners which will fit under the stock hood?

    The drop base filter will not reduce airflow.. it has the same clearance as a normal cleaner between the top of the carb and top of the filter.. but it has greater depth so allows a larger filter.. hence more air area and higher flow.