that would be a awesome fit in my boat and would give me what i want for mph . my only issue is that i have already started buying parts for what i have . so far i have a intake and carb off of a hp 500 . my biggest concern is with my stock heads cause i want to re-use them with bigger valves better hardware and some mild port work , along with that hp 500 cam and revolution marine exhaust i just don't see why i would not see 430 to 455 hp . i kinda like the idea of keeping it a carb motor just cause its easier . but honestly everyone tell me if i am missing something or if i am dreaming . also should i pull the motor so that i can inspect the crank / block and do new pistons ,rings and bearings or if ain't broke dont fix it .

If the same money will get you another motor stock Merc 500efi, why would you waste the time and money to build a 502?? But hey its all good, our addiction to boats doesn't make sense anyway

good point i was just thinking that i would have right at 2,400.00 $ to build mine but you are right if i could find a hp 500 used for 4 k i would do that

can you put the cam in with out pulling the motor . you may have to cut a big hole somewhere .

ahhh good point did not think about that yes the motor would have to come out . tim have you read all the threads to this post , i was wondering what you would do if you were me i know your 29 has steps to the hull but other than that are they similar just wondering