This is a great thread with a lot of good information for the 354 build I have started. I would like to add some information I have collected that others may find useful. I plan on using a roller cam and have purchased Lunati hydraulic roller lifters P/N 72337-16 http://www.ebay.com/itm/LUNATI-SB-M...es&hash=item2eb5dfb7c5&vxp=mtr#ht_2575wt_1091. These are the same lifters that HAMBer 345 DeSoto has used for a few years and from him it has been determined that they are a drop in replacement for the high deck DeSoto. They are also a drop in for the 354 and therefore for all early Chrysler Hemis. The tie bar has plenty of travel. I have measured .560 of lifter travel before binding at this travel the oil groove on the lifter is partially exposed above the lifter bore. Here is some information I have found: Cylinder bore centers Dodge Hemi 4.1875 DeSoto Hemi 4.3125 Chrysler LA 4.460 Chrysler Hemi 4.5625 Deck Height Dodge Hemi Low 9.29 High 10.38 DeSoto Hemi Low 9.54 High 10.37 Chrysler LA 9.60 Chrysler Hemi Low 10.39 High 10.87 This and other good information is here – http://victorylibrary.com/mopar/m-table-c.htm. Based on the deck height of the High deck Dodge this lifter should also fit if there is enough travel on the tie bar. If someone has a Dodge block or cam and can measure the lifter bore centers I can check to see if there would be enough travel without modifying.