Even in the unlikely event the bore is "straight", it needs to be, at a minimum, honed. I was lying under a Ford pickup to guide the rods onto the crank while the owner put the pistons in. Does it matter which way they face? Designed to provide a perfect fit for a hassle MG Midget Valve cover spacer washer Item:
I knew about offset gudgeon pins, but didn't know they were so common. Latest Regulars Fiat Dino Coupe Position it toward 1 piston and then bring the piston toward the top of the block. They will weigh the valve springs and use shims as needed to insure the correct valve spring height and seated pressure of the valves and springs. Looks like we'll see you out and about quite soon. The over-riding factor that influences just what is best for an A-Series engine is the block's propensity for flex at higher rpm, and the crank's equal propensity for flex at the same sort of rpm levels. With the degree wheel and pointer installed, put the magnetic base on the top of the engine block surface or deck.
Pistons - favourable features for maximum performance
Have you considered fuel. It would be nice to see the piston. This can be achieved by over-boring a standard MGB block, but this will leave the cylinder walls very thin. MG Midget Timing chain Item: Yes, no curve just a short flat section then an angled "bend" then another flat then another bend then another then another then There's new gaskets, new manifold and thermostat housing studs and similar too, plus ineria reel seatbelts.
I'd like a pound for every time I've seen these pistons with detonation damage around and above the top ring. The shop will most likely resurface the cylinder head to insure flatness, and provide for a good sealing surface for the head gasket. Remember they have to go in the exact spot they came out of it. Insufficient demand and stupendous manufacturing investment costs have precluded manufacture of a range for the small-bore units. Personally I would ensure the ring gaps are sufficient on assembly, the CR has not been raised too high and that ignition advance is suitable. The ring lands also seem to show 'peel' downwards showing the force was from above.