Since I took the time to measure em here's the specs FYI. The P5007477 ones for the LA/mag swap are 7&5/8". The adjustable MP LA ones have a range from 7&3/8 to ~7&11/16". With my LA 360/felpro thick head gaskets/mag heads I need ~7&21/32" to get ~.030" preload & the 7477 ones gave me almost zero preload. Keep us informed how this turns out.

live every 24 hour block of time like it's your last day on earth