OK OK boys, lets all settle down a bit as we all support our favorite non Datsun Marque & i enjoy a good passionate argument as much as anyone. [not that anyone has noticed]
A couple of historic facts.

DeDion Bouton had a production V8 by about 1910-12 [French]
Scrips Booth had a production OHV V8 in 1915.
Cadilac had a production V8 by about 1914
Chevrolet had a production OHV V8 in 1917 [the model D, discontinued during 1918] I bet that very few knew about that one.
The Wills StClair had a V8 in the late teens.
The Oldsmobile Viking was an OHV V8 in the early 20's [verticaly split crankcase]
The Lincoln had a production V8 before Ford bought the company in 1922.
Thats all i can bring to mind just now & all, except the DeDion are US carmakers.

The point? The V8 was well known in the US long before the thirties.

The Windsor is a good lightweight design that was held back in the performance stakes by its cylinder heads. It's light, it's narrow, & with aftermarket alloy heads, it's very good, but it's also long, limiting swap applications. I had always seen the complete engine weight listed as 490lbs

The Chevalay is a good basic design that has stood the test of time, but with it's hollow pushrod oiling, it's stamped & stud mounted rockers along with other features, it's obvious that it is an engine that was designed with a very close eye on their budget. The not uncommon situation of core shift in the block casting means that quality controll was not always right up there, yet in spite of this, it has achieved a great deal. It's great success makes it a bellybutton motor [evertbody has one] & it's hard to be an individual with it. Every silver cloud has it's dark lining.

The early hemis are heavy,... very bloody heavy, they're big, [particularly Chryslers] & they're expensive, leaving a much more limited scope for swaping.
On the upside, NOTHING fills an engine bay like one of these, they have a legendary status, they are much more exclusive, they are much more impressive to look at [opinions may vary] & no one seriously doubts that they were the very best designed & manufactured domestic US auto engine of the era. This fact alone was a contributor to Chryslers general financial demise over a three decade time frame.

To conclude.....
All have their merits, but for me, i'l be building a '33 coupe before long & my 325 Dodge hemi, being one of only two in the country, will provide all the street performance, & the exclusivity that i want. It's an engine that even in near stock form, i won't need to apologise or make excuses for. I love it, the bloody great overweight lump of iron that it is.

Suggestion
Why don't we create amother thread in the "Off Topic"section & we can continue this robust debate there, or,.... we can just agree to be one eyed biggots for our favorite non Datsun marque. I know i am.

Oh, & don't forget, the A15 is king of the hill in the smaller Datsun pushrod engine range for my money. I'm on a good thing & i'm sticking with it.