QUOTE(bretth @ Feb 6 2019, 11:46 PM)
I just stacked four 2x8" boards under each rear wheel about 2 foot long each after jacking the rear of the car up. This kept the car stable on all four wheels and had just enough room to pull the engine out on a furniture dolly.
When I say "I beams" I really should have been more specific. I was going to build my "I beams" much like the new composite floor joists out there now that are essentially 2 2x4s with 10" of 3/4 osb between them glued into a slot.
My I beams would be 10' 2x10s with 2 strips of 3/4 plywood placed vertically between the 2x10s 6 inches apart. when placed on a concrete floor these will easily hold a 2000lb car. And with internal lateral bracing they will easily hold a 4000lb Chevelle 454 SS!
While I understand the ease of just blocking up the rear end, I will need access to the entire underside of the car. I also have a 79 VW beetle so these will come in handy there as well.
So back to the question at hand...What would be a good "working" height to remove the engine? 4 2x8 only give you an additional 6" to play with. The 914 engine I measured (without accessories) was 18" tall. I just went out to the garage with a tape measure, and it seems that would be close with the car tilted forward to clear the rear bumper. So my best guess is that 2 I beams 12" tall would do, but 14" would give me a touch more clearance. But going with 14" I would be inclined to do 2x12 at the bottom for stability.
Any additional thoughts?