Technical Sonic Testing - Three Flathead Blocks - All bored 3 3/8!

I have a Dakota Digital PR-8 . . . with probes for cylinders as well as ports (3 different ones). The base system is about $1200, which is not cheap, but when you deal with a lot of early blocks and consider the time/money spent on bad results . . . kind of makes sense. The other reason I have it is due to porting flathead blocks (Flathead Cadillac, Ford V8) - these things give you some idea as to what material you have to work with inside of a port or around the valve pocket and they definitely make it possible to sleep at night!

Once you have one . . . you'll always have one . . .

Dale