17-01-2020, 05:57 PM
Not sure that fitting an SV Reliant block would be simple or that it would solve your issue. the SV Reliant crankcase is taller than the A7 one to provide clearance of the Reliant big end bolts to the camshaft; so it's likely that the Reliant block is the same height as the A7 block. It's ages since I worked on one but I remember the cam followers being completely different to the A7 ones as they're a flat faced top hat type. The position of some of the Reliant cylinder head studs and waterways are transposed when compared to the A7 block.