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BSFC is pretty much fixed at about 0.4# of fuel per HP per hr for a 4-stroke spark ignited motor Diesels are about 0.333#/HP/hr

Pampers with the adhesive strips works too

Look at getting seats made at your local upholstery shop. TACO, MMC, Springfield and others make better hinges and brackets, but not necessary seats Wise, and others make seats,

10 hours for breakin

The bolt is an M8 x 20mm That means it is not a crank bolt. Could be a coupler to flywheel May be an inspection cover bolt May be an accessory drive bolt May be an accessory bracket bolt Spend $11 on a borescope for your phone and check the coupler

Nitrous will help

With or without tequila and a lime?

Most RV parks have a list of rules. Florida has more than it's share of rules They may allow use of golf carts down to the docks

Impeller on a cobra is a 5 minute job

I believe the SBC seals are the same

If only you knew someone that had access to GM parts ;)

Check to make sure the sender was set correctly

Could be valve stem seals. GM wasn't known to spring more than $.03 for valve stem seals

You're just draining now?

Sno-bowl toilet bowl cleaner from tbe dollar store. Or mix up your own oxalic acid

Yes, Gen 1/2 SBCs and the 4.3 until the metric block had used the 7/16-20 flywheel bolts The Metric block used M11x1.5 crank bolts like the Gen 3/4/5 SBC The 9.8 metric stamp on the head points to the 4.3 90M metric block (1999 and later)

The thermostat is set up as a mixing valve in raw water cooled setups No need to pull it for pressure testing

^this is what I described in post #4

Flywheel to crank is a 12.9 flanged bolt. My guess since it's a 9.8, it's most likely an accessory, or if it's an M6 it's an inspection cover bolt

1991, the block was changed, 1- piece RMS crank, moved all the tooling to Mexico, consolidated designs of rotating assembly with other GM motors The flywheel went from a 153 tooth to 168 tooth So get a complete bobtail