340 or 360?

65 Cuda 340 said
360 block was based on the 318/340. 340 was block was based on the 318. 318 was based on the 273. 273 was based on the 318 poly. 318 poly was based on the 277 poly that's in my 56 Plymouth.

Different bores, different main bearing diameters (360, all others same), other minor changes, but critical dimensions - bore spacing, deck height, length and width of the block, cam to crank distance, lifter bore angle and diameter, etc - are ALL the same, from 1956 until the third gen hemi replaced the A/LA. And even the latest hemi has the same bore spacing as the 277 poly in my 56 Plymouth.

I have the 56 Savoy with the 277 and it is a sweetheart, all 160 horses of it!
I use a 96 ram 360 for my driver now, and in the 80's to 1996 I probably put 100k miles on numerous cordobas and doge Magnums, as they were our family cars.

The 360 is a great engine, and does a good job with the passenger cars.
My 77' Cordoba with the 400 is a really good unit, but I used to own a 79 300 with the HP 360, and that car had a lot more go to it than the 400.
and it drove better as well,,,,