Machining issues resolved! Suspicions confirmed---another machinest will use Main journals as reference for decking block, not mock-up method. Hopefully back to 2 steps forward 1 step back---not the reverse!
My interest and information on Long rod engines comes from several articles, particularly those on 351W w/400 rods. torque specs, tolerance for higher compression even on 87 gas, and better breathing for less ported heads are very interesting to me for my application. Since I will have to order custom pistons anyway to accomodate clean-up necessary on bores, why not go for a long rod setup. I have no facts to prove that they are really worth the effort, but this will not be the first time a hot-rodder has "winged it"!
6.2 rods are available w/351 journel sizes (2.31), same as our 3.8's. 6.25 rods (which would increase R/S ratio slightly more) are available from Eagle, but are Chebby journel sizes (2.1--I think). I believe that some do not recommend taking our rod journels down to that size because of loss of strength.
I do not expect to do a lot of expensive blower and plenum work, maybe pullies. Head work will have to be done early to determine volume for comp calculation. Cam will be relatively mild----520 or less lift probably, w/low to mild duration figures. Of course exaust work will be first along with eec tuning. Still have numerous issues to resolve, but will try to get engine machining started in right direction.
Feel free to PM me if you think of anything else. I have good amount of engine knowledge, but have never done a V6 or SC'd engine.