Heads, cam, intake combo and rebuild gonna getchur wife a lot of roses. Gonna be closer to 5-6k.

Maybe a little less. I forgot you had the dart intake. Make sure builder port matches intake.

I've been recently quoted 2-2500 for rebuilding short blocks with new pistons, etc. (I strip them and put the heads back on later)

EQ heads I believe I had $1400 in them with buying them bare and having a machine shop set them up. I'd have to pull recipes.

741 cam was $440

Gaskets were a few hundred along with longer ARP bolts due to heads.

I'd say budget for 5k and you should be fine. May get it done for 4k

Keep this thread going as you build it. I am looking at the same deal.

FYI, I am running a 502 with GM Alum 110cc 290 Oval Ports and a Dual Plane with 850QF. Isky cam very similar to 525EFI. 9.6:1. Runs really strong but I can't quite turn a 28 B1 fast enough so...

I am looking to build a 509 with a good set of Alum Rect. Port heads and make 600+. I want the 10:1 sound and fuel headache! I have a spare block and crank so might as well right?

As for the other issues, I'll ask my wife if I can buy a 30P B1. You have to let them see some things being bought, otherwise they get suspicious.

http://superboat.com/ open link go to downloads, page 40 of technical rules the 509 svl engine. i think in the race boat threads the svl guys are talking 630 640 hp range

He suggested promaxx heads. Bare unassembled and he will build em up. Said hes used em in past and they flow well and no issues although he admitted they do get a bad rap. I did some searching online and mostly good reviews for the $. Thinks i could be done with head work for $1500ish. Block is bored, crank was turned/ polished. Starting to blance the rotating assembly.

If on a tight budget, hands down i would go with a set of engine quest bbc iron heads, over those pro comp / promaxx chinese heads. Dont get lured into aluminum being superior to iron when it comes to performance. Even raw water cooled engines can corrode aluminum, throw in some cheap porous chinese castings, it could get bad.

Did this build ever happen? Updates?

His wife must have found out...

I don't even ask anymore. Easier to ask forgiveness.
That and Alzheimer's helps.

Lol. Yes it happened. Got the motor back in the boat in october. I got it on the water once before winter. I can tell its got more power but i never ran it over 4k. Rpms.

I am about $6100 into it. that includes a new quick fuel carb ($650). New set of promax heads bare that he assembled ($1500 ish). Custom ground roller cam. New pistons. I reused the crank (eagle), dart intake, ignition (msd). Motor wasnt dynod but he broke it in on his stand. I was there to verify. It sounds good, runs good but i only have 2 hrs on it so not much to go on yet. Overall ill be happy if it lasts.

Oh yea........wife thinks it cost $4000. She was more pissed about the 2200 i just spent on a tube swim platform then the motor