I'm in Missouri and expect to pay shipping. Surprised some charge a core charge even when buying a new engine. The ski boat its going in is a 1997. It has TBI and a roller cam.

Michigan Motorz has been around a long time and I've had good experiences buying parts from them.

quote:

Originally posted by Delmag Tech:
Michigan Motorz has been around a long time and I've had good experiences buying parts from them.

I've bought one from them in the past, they're sky high and charge for core on new motors now.

If it's just a Chevy 350 I'd order one from whoever had the better pricing, Summit Racing etc.
I would expect to pay a core on a 350 now days.
They've been out of production for a bit and I would bet rebuildable cores are valued much more now.

Is overhauling that one not an option?

Try Discount Inboard Marine or My Inboard Marine. If they don’t do complete engines I bet they can point you in the right direction.

Probably just a standard production engine used as a basis for the build with a camshaft change and USCG Approved electrical and fuel related parts.

Though with this being said I would not look at the GM Performance Engine offerings. My interpretation of the current warranty at best would be thirty days coverage parts only but more likely any warranty claim would be denied due to marine usage and modification if a camshaft change was necessary.

Marine usage was never specifically referred to in prior warranties, in the past it was considered a non cataloged usage with parts only up to 24 months but that was back when I was selling those and I’ve been out since 2017. I politely blew those types of inquiries off and if pressed my response was that while I would not refuse to sell to them it would be sold with the understanding of no warranty as depending who I spoke to in GM I never got a clear answer for “what if”. The dealership had a disclaimer form that we used when sales or service modified a vehicle at the customer’s request that could or would affect the warranty coverage and I had copies for my use.

If you look at Jegs, Summit, or maybe Blueprint for an engine I’d get in writing the warranty coverage before I bought as they may take a dim view of their product being used in watercraft.

Summit has marine 350 long blocks.
18 month unlimited hours warranty.
https://www.summitracing.com/s...lic-roller-oe-roller

Personally I would rebuild the one you have, or start with an identical core. Have a quality, high performance type of machine shop do the machining, and the engine will be smoother, faster, more efficient than a stock engine. Also I would buy a box of Manley stainless exhaust valves, skip the super expensive OEM type valves.

-Align hone the main bearing bores.
-"Deck" the block so all four corners are the same height.
-Set the connecting rods the same length.
-Set the piston tops to the same height.
-Balance all the rotating parts.
-Ideally CC the combustion chambers.

[QUOTE]Originally posted by powermad:
Summit has marine 350 long blocks.
18 month unlimited hours warranty.
https://www.summitracing.com/s...lic-roller-oe-roller[/QUOTE

I would call them before ordering. There is a difference between Vortec and TBI heads. First one listed is Vortec. Summit would be the way to go, I've had excellent customer service with them.

quote:

Originally posted by c1steve:
Personally I would rebuild the one you have, or start with an identical core. Have a quality, high performance type of machine shop do the machining, and the engine will be smoother, faster, more efficient than a stock engine. Also I would buy a box of Manley stainless exhaust valves, skip the super expensive OEM type valves.

-Align hone the main bearing bores.
-"Deck" the block so all four corners are the same height.
-Set the connecting rods the same length.
-Set the piston tops to the same height.
-Balance all the rotating parts.
-Ideally CC the combustion chambers.

Block and heads are cracked from freezing.

Ouch, there goes the cores.

Any chance to source a 350 from a salvage yard for a decent price?
One from a truck would be the one you want.

A 1997 engine would be based on a Vortec long long block. So the intake form the current engine should bolt right up to a new Vortec Long clock. I will also note that the cylinder hands for the Vortec engine are the very best heads that Chevy ever produced for the SBC.

A heads up if you try to source a used seasoned block to build.

Be aware that some blocks around the 2000 era during the last hurrah of the SBC had metric threads for the bell housing and engine mounts. The rest of the engine were standard threads. This issue came up only with production engines, the service replacements had all the threads in standard pitch.

These blocks were used in the G Series vans. The parts catalogs initially had no notes for us so the usual fun ensued when we would give a technician a replacement engine and it wouldn’t bolt up.