One of my spare bare 6.1 blocks with main caps was 190-195 on two cheap bathroom scales. Probably 30 lb heavier than a 340 block and 30 lb lighter than an RB block. Lighter than an R3 I believe.
For you guys afraid of computer controlled spark or fuel- look at megasquirt. EFI source is $1300 and you can run just ignition control if you want. 4 wire hookup. It offers everything the FAST does, and in some cases more. Or you could buy the box for ~$650 and wire it yourself. My megasquirt install: http://www.forabodiesonly.com/mopar/showthread.php?t=226125
Launch control, 2 step, no lift shifts, nitrous control, boost control, etc. Don't know what all is available without fuel control.
