What size engine for the online/Youtube EC?
I voted for the 360 but I love 340s! back in the seventies as a 19 year old I built a 360 with 340 pistons along the lines of Hoovers Mover!
My dad who was an old retired mechanic that served in the war on aero planes and was a motor bike racer in his early years forbid me to put a regrind cam in it as he said it would destroy all the valve gear angles. He said only a new billet cam would be allowed but in australia it was not just simple in those days to get parts ordered from the US like it is today.
I made my own 4 into 1 headers with just an oxy set and a stick welder and put that high compression 360 together with std cam and a 650 spread bore carb.
First time I took it to the drags it ran 13.7 qtr through the street exhaust with std 3.23 diff and 4 speed manual box.
It was a quick street car for its day!
Later on my brother went to the states and bought me back a 1968 340 and 4 speed, so I built it with forged pistons, six pak carbs and a little home porting and a 292 purple shaft cam. Ran it at the drags only to run 14.2 qtrs.
Well I realized that it now needed a diff ratio change so put a 3.91 ratio in it and it responded with a 13.6 qtr time. The car eventually ran a 13.1 with a set of tall slicks that would of really needed a 4.56 ratio to make the best of it.
That 360 with std factory cam made me realize that if I did the same things as I did with that 340 to the 360 it would be much faster!
Now for the guys that have mentioned about the Aussie Hemi six, there is a guy in WA that has built a stroker crank hemi six to about 290 cubes N/A and is putting out over 550 hp and is still tuning this beast and yes it is just a street car! Another guy has an Aussie Chrysler centura with hemi six running mid seven sec qtrs with a turbo on it and he is an engineer and is building a billet head for it to go even faster. Just google "justa6"