Has anyone used cnc motorsports for marine work? They have a 9.2:1 532 (4" stroke 4.600" bore) for around $5k.

As stated above ^^^ Im a long time buyer from them never an issue, racer guys selling hot rod parts, Id get the details on clearances ect. how it was put together, is this a Big M block ?

I like the 4.6 bore for unshrouding the valves but it doesn't leave much for clean up.

Not a Big M block but they do offer that as an additional cost. I like their choice of parts, 6.535" rod on a 4" stroke should work for years in my setup.

From their site...

BB Chevy 532 Short Block Assembly
New Scat 4340 forged steel crankshaft (4.000 Stroke) **Internal Balance**
New Scat H-Beam connecting rods bushed fit pins with 7/16 ARP 8740 bolts (6.385 Length)
New JE forged -3cc flat top pistons (4.600)
High performance plasma moly piston ring set
ACL/Clevite 77 Rod and Main Bearings
Dura bond cam bearings
Brass freeze plug kit
Dura bond finishing kit
New Dart Big M sportsman block, short deck
Compression Ratio with 110cc Heads: 9.7:1
Compression Ratio with 118cc Heads: 9.2:1
Compression Ratio with 124cc Heads: 8.9:1

*Professionally Machined, Balanced, Assembled and blue printed in house by CNC-Motorsports. Balance card and blue print sheet will be provided to the customer. All short blocks are standard bore unless otherwise noted. We can custom build any short block assembly to meet your needs. *Ships Truck Freight*

The only thing I requested different was the piston and rod combo in 6.535" rod length, only added $100 to the price. I can't buy all the parts for what they will sell the whole package assembled for.

your post #4 had a 6.535 rod 6.385 makes more sense , this post have a big M do you not get that for 5K ??

6.535" rod length is what JE makes a shelf piston for. I'm confused with the Big M option as well. The listing on their site says "add $450 for Big M". The spec sheet however lists a Big M, I will see if Chris can clarify on that.