Replacing engine, what will fif?

[Surfer]

Hi,

anyone knows which one is the exact replacement base engine for my boat? Listing below.
My MC is 1995 TBI, with 275 hp. Did Indmar use cam upgrade engine option, or TBI gives extra 15 hp on the first engine on the list?
S/N's are the same on each.
2 or 4 bolt main, I guess that is what decides this?
The list is what First Mate marine engines offer.


BR,

Pasi




88-95
1 Piece rear main seal. Valve covers bolt down center. 2 bolt main.
Has metal timing cover. Flat tappet. Works for carburated or fuel
injected. 12 Bolt intake.
260 5.7L
350 CID
V-8 548, 526,
148, 638
– – GM350LC GM350RC GM350LCT GM350RCT

88-94 1 Piece rear main seal. Valve covers bolt down center. 4 bolt main.
Has a metal timing cover.
260 5.7L
350 CID
V-8 548, 526,
148, 638
SGM350LCF SGM350RCF GM350LCF GM350RCF GM350LCFT GM350RCFT

88-94 1 Piece rear main seal. Valve covers bolt down center. 4 bolt main.
This is a cam upgrade. Has a metal
timing cover.
275 5.7L
350 CID
V-8 548, 526,
148, 638
– – GM350LCFHO – GM350LCFHOT –