I think the 59 is the better candidate. It has a neoprene rear main seal, as opposed to the early 55 rope seal. the early 55 also uses shims on the main bearing s where the 59 used precision bearings. It has the 848 head which translates to 8.0-8.5 compression ratio and higher horse power. The early 55 used the 5913 head which has a larger chamber and lower compression ratio, lower power. The 59 was also the recipient of the last oiling updates for the 235. So it has the better rocker arm oiling. Bearings are a little easier to find. Uses the delco remy 2403 distributor which uses tune up parts that are easier to find. Starter motor uses the later style solenoid which is again easier to find. The block is drilled for hydraulic lifters which means you can use hydraulic lifters or 56-62 261 truck solid lifters.
Last edited by Dragsix; 01/08/2024 8:21 PM.
