There are spacers available to use a standard passenger car manifold with the tall deck 366 and 427 truck blocks.
LB I believe the timing chain is the same however the distributor is longer in the truck block but there are also manifolds that use the passenger dizzy with the truck block. As LB stated that t truck blocks are popular with guys who build large stroker engines.
Bill I don't know what blocks you were using but if you decked a standard 366 or 427 block a 1/4" you would be in the cooling passages or be so thin you would have a useless block but when building a big block with a stroke over 4.25" the tall deck block will allow you to use long rods decreasing piston skirt loading and increasing piston dwell time at TDC.
