Engine options scarab 1
 

I am going with the bbc 454 that i have, and is the starter in different location for marine use, can a truck block be retrofitted ?

I’d stay with the BB and add a Bravo drive and you’ll be happy for a long time. Replace as much cast iron off the BB with aluminum bits and you should be close to the oem small block.

Caveat: I really know Jack **** of what I’m talking about but that would be my path to explore.

Engine options scarab 1
 

will the starter location be same on a truck 454 block as it was on the 350 sb that came in boat?

Engine options scarab 1
 

Im trying to use the flywheel cover that came with boat, also trying to id if block it mark IV or gen V, it has a fuel pump mount but block off plate bolted to it and also has hole for crank sensor on bottom of timing cover ? Any help appreciated

starters are in the same location on a SB and BB, unless a top mount rear CCW starter is used in a trans application

Engine options scarab 1
 

https://cimg4.ibsrv.net/gimg/www.off...8dfd49d7d2.jpg
1st time tryin to post pic. Here she is old but solid transom

^ looks good!

If you spend some time going through the Mercruiser parts diagrams, you should have a good idea of what you have and what is required to make the swap....

https://www.mercruiserparts.com/part...ndrive-inboard

Engine options scarab 1
 

Thank you

Merc had 330hp BBC in front of Alphas for a couple of years. Late 80s maybe? waiting on the Bravo. A friend had one he bought new that lasted until he decided he wanted to hop it up quite a bit, then it didn't make the next summer. :(