Ok, OK, oK......
I measured the width of aforesaid motor while I was ogling it last week and it appears to be a little wider than the Buick based V6 we have in the car so we're going to send it back.......

When we first started building the SOS the Reverend had some blow moulds made of the 1:5 scale model he had turned, there are still some of these floating around , I think possibly in the roof of the SOS landpseed laboratory, possum park and idiot wonderland which is currently occupied by Professor Quick, the push car driver and agony aunt of the SOS team. I'm figuring that following on the design cues of using every single tiny bit of the Canberra and F86 tanks that we could (reversing the piece that forms the roll cage cap, using the very tip as the scoop) that a 1:5 scale piece of the Canberra would make perfect blisters for the heads of the new motor to fit within the cowl.
This is where it gets complicated. The car was built around the Y-Block config of the Buick motor, the Chev with it's skirt finishing at the crank centreline and it's vastly smaller sump could likely fit lower in the car, the heads would then fit sitting lower, in a wider section of the body. Sounds simple? Thing is that would involve tilting the diff housing and changing the gearbox mounts and probably the scattershield mounts. In my estimation that job would make the two days of work to drop the front axle 1/2 an inch look like a pork in the wark. The scattershield and gearbox wouldn't be so bad but rotating the diff housing would probably require a thermo-lance, after doing the 10 bolt conversion the whole rear assembly is pretty much solid steel with a few tiny holes the axles fit through..........
So anyway, in answer to your question that you arksed elsewhere I haven't hoisted the motor from the tank yet, I need enough room in the more than expansive shed to stand and right now house renovations are still making that difficult. The Chev is staying in it's box until we get back from the salt in three weeks. When that happens I'll be at it....