as far as value. that was covered above
I have a 59 vintage gale that has sentimental value. so that will become wall-art. the two early 50's Mercs (Mark 7 and Mark 20) were sold for about 200 for the pair after having listed for almost a year.
I would stick with aluminum. Edelbrock 2519 is the dual alloy (bronze water passages) like the OEM Volvo/Ilmor intakes.
flywheel is same for 305/350 after 1986
are you running a heat exchanger, or just raw water cooling. if raw water, do you want cast iron? or dual alloy aluminum? 2-barrel or 4-barrel?
there is no HP limit on boats with I/O's, only on boats with outboards
only if you convert to fuel injection. the block and heads dont have a clue if its a carb or EFI up stream.
the vortec cylinder heads just require a different intake than the earlier SBC's since you have to buy two new intakes anyway as yours were in salt and most likely rusted beyond use.
depends on what the bore gauge says. however my guess bore and hone.
how does the bores look where the port are?
the piston is missing parts above the compression ring.
check the neutral safety switch. if the EDM thinks the motor is in neutral, the RPM wont go above a certain RPM
check fuel pressure. if you are TBI or MPI, there are different pressures.
Wiring diagram never existed.
Look for the generic information in the electrical forum. The wiring colors are an ABYC standard. And the wiring specific to the motor in the motor manual
