Needed to give this discussion an update since it's been a few months.
Over Christmas we got the engine/trans pulled and have had a chance to tare down the top end to take measurements and confirm our starting point before bolting on any new parts. The pulled motor stats are:
1. Verified a 4.00" bore x 3.48" stroke
2. Piston deck height of 0.032"
3. Head Gasket thickness of 0.039" compressed (scratching my head as to why the PO used such a thick head gasket
)
4. Stock heads with 76cc chambers
Using a dial indicator to ensure TDC I am confident that my piston desk height is accurate but I'm confused about a few things I'm seeing and would like some feedback:
1. Since the mileage of this engine has been in question from the get-go (This is a 1973 truck and odometer says 21k miles which could be 121k, 221k, etc...) I'm looking for evidence of any level of rebuild. Though the bore is still at 4.00" I'm seeing markings on cylinder wall as if its been honed (see photos). Hone & re-ring????
2. Also the current pistons have 4 valve reliefs (see photos) which is excessive for these two-valve stock heads
Thoughts?
