Mark-4 block, considering to bore 100 over w/4.25 stroke = 505ci
Just asking, is there any reason for a river/lake runner not to fill to the water pump line or lower or...not at all?
For a 1/4 mile burner I wouldn't question filling the block but, I'm not sure cooling or other issues could be a factor in how I use my boat.
(Rex bypass T-stat used, usually see 160 +- 5 current block water psi usually 8 lbs)
As always, thanks for any feedback.