Looking at the CKC build document two trestles are required to mount the tub on until the rolling chassis is built up, the rear one to be 200mm taller than the front. This gives ease of access to the underside of the tub and reduces the amount of time you spend sat on a cold concrete floor whilst I install the fuel, braking systems, suspension, drive system etc.
source:CKC Murtaya Build CD
I plan to use 75mm x 50mm timber and coach bolts to construct the trestles. They have to be substantial enough to hold the tub up to the point where the car is effectively a rolling chassis with engine, transmission, suspension, brakes and wheels. I was going to follow the photos shown in the CKC build document. I’ll take a measurement of the width of the car behind the front wheel in line with the bulkhead. Height wise there has to be enough clearance to slide the engine under the sub frame. When removing the engine from the donor car 600mm was required to slide the engine from under the car and the front sub frame follows the base of the tub. So I estimate the front trestle needs to be approximately 700mm and the rear trestle 900mm.
However, I was chatting to Graham from MSC online who pointed out that instead of trestles supporting across the car "axel wise" if the trestles run lengthways between the arches mounting the drive train and pipes should be a lot easier to install. A removable tie or two between the two trestles will help with stability. This may make lowering the car when the rolling chassis is complete a bit interesting. But one step at a time.
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