That will work.
The 216" ports are smaller & those mainfolds won't fit the 'later' 235/261 heads W/O midification.
What engine is it on now??
If It's on a 'later' 55-62 it will fit. If It's on a 216 (large sideplate) you'll need to measure as the larger will fit over the smaller.
Clear as mud, right??
Have fun!
