What parts are interchangeable 90 2.4 racing vs 89. 150 xr4

[Merc 2.5]

Well looks like a bp block , not sure y it's got 5 pedal front half guess someone put it.on there at sumpoint , 2.5 b better build but the old bp ran gud if built back like suppose to b

[TEXAS20225]

a load of changing for a not so experienced motor contestant and i mean that in a nice way as you will be a contestant trying to win a up hill battle !!!! horn equals different front, injectors, reed plates hold downs, harness , ecu external tpi unless you go with a digital ecu , different fuel system which is several different items you would need so much stuff to turn it to efi youve never seen and with no experience its not a so easy project. i gave big big bunch of bridge port parts to Chris Carson a few years ago several horns fronts all kinds of stuff off of bridge ports think i found a external tpi while looking for my DDT chips the other day if it was me id build a 200 efi and leave the 2.4 stuff behind at this point some parts are disappearing from the market and NLA or a carb 200 which is a lot cheaper

[MercRoy]

Thanks for the input all and certainly impressed by the wealth of knowledge on this site. I leaning more to agree with Texas here.
Anyone need a 2.4 BP block and mid section?

[bullet123]

post pics of mid. If its one piece plate and single ram trim, worth more than the rest of your Bridgeport stuff.