[olddog]

Most people who have concerns on stroker engines will talk about or look at the Rod Ratio, which is the length of the rod divided by the stroke. Here are some rod ratio to compare.

Ford SB 260 and 289 rod ratio is 1.8
Ford SB 302 and 351W rod ratio is 1.7
Ford SB 351C rod ratio is 1.65
Chevy SB 350 rod ratio is 1.64
Chevy SB 400 rod ratio is 1.48
Chevy SB stroker (350 rods with 400 crank) rod ratio is 1.52
Ford FE 428 rod ratio is 1.63

Now what is the 347 rod ratio? A reasonable 1.59

PS
That said I try to keep my 347 below 6200 rpm, but it has hit the 7000 rev limit a couple times. I have a fairly standard rotating assemble with "I" beam rods. With better rods and zero balance, I would not be afraid to turn it 8000 rpm all day. It is how it is built that limits the rpm, not the rod ratio. In fact, keeping the valves under control (not floating) is much harder to do than building a bottom end for high rpm.

I have seen ~430 cid Small Block Chevy running the 1.52 rod ratio run in dirt track cars at 8000 rpm. Run the same engine 3 years at a time. Very common. I have also see the Chevy 383 stroker (350 block with 400 crank and rods) with the 1.48 rod ratio ran in dirt track cars at 6000 rpm without issues.

Ford 347 Strokers are very common around here.