Can anyone identify this block?

[pt-73]

489997489998
490002

This has a Brucato box that was originally setup as a 260 laser. It won’t wind up past 5300rpm, never has since my buddy bought it. It’s been sitting for a while.

I would like to be able to tell what the block is before trying to troubleshoot it.

[rjdubiel]

is that a LL stamp on the block? 260 block then? But I have seen "LL" and this is "ll", lower case L? I don't think any block were II (ii) or if there were no clue on what it stands for.

[perfmarine1]

Merc parts catalog for that # says

Service Literature for HIGH PERFORMANCE 20"MID,RH CLE GEARCASE 2.5 L CARB

[Sutphen-1986]

Sure looks like a 245 carb block with the carbs taken off and a laser style injection system added. If it was a 260 it wouldn’t have the bleed line barbs on the block.

[Laseraddict]

Sure looks like a 245 carb block with the carbs taken off and a laser style injection system added. If it was a 260 it wouldn’t have the bleed line barbs on the block.
Makes sense with the bleeder fittings on the cylinders.. and it's such an easy upgrade throwing a laser EFI setup on one I'm sure a lot of the hi-po carb motors have been converted through the years!