FlyHiFlyLo, As Phil1934 said, this engine takes a neutral balance flywheel. The 28 oz will not work, unless it has removable weights. 240 and 300 inline 6 motors have the same bolt pattern and are neutral balance, but I have not found a flywheel for them that is 157 tooth. Internal balance SBF strokers are not uncommon so the flywheel is available somewhere. The stock SBF flywheel is lighter than the I6. https://www.amazon.com/Fidanza-Balance-Clutch-Flywheel-186501/dp/B01M3PSPCC https://www.amazon.com/PRW-1628980-...rd_wg=msZyB&psc=1&refRID=5TCAJWVP0PYDSHHS2P5R This one says 28oz or 50oz external balance but the weights are bolt on. Possibly it could be run without either weight as a 0 balance https://www.amazon.com/Procomp-Elec...rd_wg=id8Ep&psc=1&refRID=6C7A2JSR6D393VWH7SWH I agree with your thoughts of turning the crank rod bearings to BBC dimensions. If I go that route I will be putting a little more stroke into the crank. There are 460 Ford pistons available for that rod swap, but not at bargain prices. Since I am using the A460 head my pistons will be custom anyway. I don't believe the stock camshaft will be compatible with roller lifters. The material of construction is wrong and the aggressive lobe of a roller is larger than the current lobe on the cam. I wish it was that easy since the aftermarket roller blanks don't have the distributor drive gear on them creating ignition and oil pump issues. (Not proven, but my belief) Unless using keyed roller lifters the bolt bosses that retains the lifter cover need to be milled out of the block. The bolts will not clear the dog bones or lifter tie bars. See post 1325 on page 45 for more. Currently there are no provisions on the crank or the cam to install an internal seal for your belt drive rear cover. The cam is retained by a plate located directly behind the timing gear. The crank timing gear us seated against the front bearing boss. If you get these worked out count me in for a couple! I have been wanting to put a crank and cam into a block here to get a center measurement on the timing set, but have not had the time - soon though.