Yes, I saw the post, was hoping for details on the TBI to 4bbl adaptor and the computer controlled distributor (like, a part number). I was thinking I could take my stock divorced coil HEI and use the remote coil from a 4.3, just need to check out the compatibility between the signals (possibly put the 4.3 guts in the 250 shell?) . Looking at the above, it appears that if I could find an Astro with a popped 4.3 cheap I could get everything else needed.
I've seen knock sensors mounted to the metal portion of the motor mount ont early V-8 conversions. Unless you run too much static timing it doen't have to be very picky, just tell you when she start knockin. We tested them in the plant by hitting the block with a brass hammer!
For the temp sensor I was thinking drill and tap the neck at the thermostat. Seems like that would be a good spot to pick up the flow.
