[WKB]

JD, I have both a 100mm extended Harrison and a DRB540. I am 6'2" and comfortably fit into both.

The 540's footwell is wider and longer than the AC kits I have sat in. The later 540 kits have had the bulkhead behind the seat moved back about 25mm which gives a bit more room to the steering wheel, but could make it a bit of a stretch to depress the clutch pedal for the vertically challenged. There is no problems fitting the production seats in, but being a tall person the padding is to thick to use them and have a comfortable driving position. An aftermarket seat with thinner padding would be the go.

The choice between an AC and a 540 is, do you want a car that drives like a comfortable modern car with all the mod cons or car that has the feel of an old school sports car. With the right kit you will fit into either of them. To me, the 540 is a more comfortable car to sit in and drive, but they are both fun to drive.

As far as building them goes, the 540 a lot easier to build. A guess would be around about half the time.

Warren