V4 crossflow engine block compatibility question

[havoc_squad]

Would a 1988 110 HP engine block be an exact replacement for 1990 V4 crossflow block? Someone very recently is selling a machined block (3 holes 0.02, 1 hole required 0.04 oversize) for $150 within reasonable driving distance. I would be more inclined to buy it except the 0.04 hole. Would it be best to just use what I already have if the worst it needs is 0.02 or buy the already machined one and replace the essentials? I am planning an engine disassembly in about a month or so to free up stuck rings on starboard cylinders and have very light piston ring scoring I'm top starboard cylinder at 12:00 position. If I have to spend around 400 dollars in machine work and shipping to remove typical wear of a motor never oversized, is that better than having one ready to go for 150 but has to have the 0.04 hole resleeved if out of spec?

 

[havoc_squad]

If the forums gets the issues fixed soon, I'll try to clean up the lack of spacing. Otherwise, if it becomes too late for me to edit, I would appreciate if a moderator could edit it to make it readable. Jumbled posts drive me nuts reading.

 

[racerone]

Essentially the same block.-----Except if the 1990 model is a 90 HP.-----Those had smaller intake ports than the 110 HP models

 

[havoc_squad]

Guess I got painted into a corner with the 90 hp limit on my aluminum boat. Seems a bit low for a fish & ski 17 ft hull. I take it larger intake on block, bubble back exhaust, and larger jets equates to 110/115 motors. Everything else is the same. Oh well, hopefully disassembly doesn't reveal any major suprises.

 

[jimmbo]

Porting(transfer holes in cylinder wall are different), that was what Racer was referring to. Carbs(not just Jets) would be different too,

 

[havoc_squad]

Yeah, I'm aware it's the intake ports on the cylinder and not the intake housing where the carbs are fitted. The size of the hole regulates the allowed fuel/air mix volume to enter before the compression stage. They tweak the HP of the motor using this and a few other items to minimize design changes across multiple HP offerings.