I am building a 440 stroker motor, the motor has been decked to 10.965 and the final bore will end up .030 over. I was going to use a 4.250 K-1 crankshaft, Eagle 6.800 rods and Probe SRS forged Pistons. The pistons have a 1.770 compression height and with this combination it should give me a zero deck height if I did the math right. Every other stroker off the shelf kit the pistons in the kit put me either over the deck height or to far in the hole.

The rod ratio with this combo is 1.6 and will give me 9.5 compression with iron heads that I will later upgrade to aluminum at some point.

What do you think of this combination, I have not seen this combo in any other stroker kits advertized. Am I way off base with this one or will it be a nice high performance street motor. Trying to stay away from a high priced custom piston.

These are the pistons on summitracing Probe SRS 14896-30
Pistons, Forged, Dish, 4.350 in. Bore, 1/16 in., 1/16 in., 3/16 in. Grooves, 1.770 in. Comp. Height, Mopar

I ordered some of those pistons back in October, Probe promised me they would build them in the first couple of weeks of December, NOT TRUE I ended up ordering custom Diamonds in mid February, I got those pistons two weeks ago

What combo did you end up going with?

quote the motor has been decked to 10.965


You must have typed this wrong. Am I correct? other wise a 440 is 10.72

Good catch I meant 10.6950

I heard K1 is no longer producing parts.!! Let us know if you find that to be true or not!!
I was going to buy one of their cranks for a low deck motor and my machinist said they were no longer making them...

Sounds pretty good if all parts are available. Rod ratio is pretty good for a stroker. CR is about right for iron heads, pump premium and a moderately big cam (? cam). Heads, if OE style iron, will be the limiting factor in power. Might want to figure compression with your planned aluminum heads also... hopefully the chamber on the AL heads is smaller to give you low to mid 10's CR plus quench.

Only other question is about your application. Street? Street/strip? Autocross? Road race? It matters on particulars like CR and cam/valvetrain.

Really only think its going to see street use in a 68 Dodge Charger.

I'm building a combo close to yours. I went with Diamond custom pistons that will give me 10.9 with 84 cc heads. Let's see some pics

Why not a 440S kit? Or buy pistons from them? I have used step dish Icon 4.375" pistons with 1.485 c/h and 7.1" rods, and 4.15 cranks that I have offset ground to 4.303", then milled the pistons to fit the deck height. If you use the 4.25 crank it should fit nicely, at 10,71" and you can fit the pistons perfectly during mockup. You can also choose from 3 different style Icon/440S pistons; flat; small dish or large dish. You can even buy it fully balanced, and the small amount you take off the pistons will not affect balance negatively.
I just offset ground 2 cranks to 4.303" and used these parts for strokers, on a budget.
If you buy the parts 1,77" pistons and 6.8" rods, and regret, I think you will have a hard time selling it!
My

Sounds like my old 508, I used a Diamond piston and Manly 6.76 Mopar length chevy 2.200 journal and .990 pin size rods.

Great motor, ran a ported street dominator and ported Stage V heads, very stout street motor.