Sst-60 Vs Stock 56 Cube Block

[scudder]

Hey,
Has anyboby sat these two side by side and seen the difference between a stock "70" 56 cube rude block and the SST-60 block ?
Sea-way has sst block mail order for $500.00 but I dont know if it is worth it since I already have a stock block . What was the rpm range of an sst60 ?
I noticed it takes the same part # base gskt so I am assuming the exhaust isnt hogged out .
was the port timing/area different ?

[Howie Nichols]

The SST-60 race block is the loss foam block not the permanent mold style. It also has bridge port sleeves in it which most of the stock blocks do not have. The stock version will run and have great acceleration but no where near enough top end. I had a stock block built at one time by mistake and when I figured out that occured and switched to the racing block picked up 800 rpm the first time I put it on the boat. The casting # on the race block is 334474 and has webbing across the back of the block towards the exhuast side (that is the easiest way to tell it is a loss foam) Advanced Sleeve sells new SST60 sleeves that you can put into the stock block and make it a racing block as long as it is loss foam you will be legal.

I have a complete powerhead that has lots of work done to it and about 1/2 season on it 4sale at $2500. Crank measures exactly the same on all 3 journals and has the piston protrusion that many people are looking for.

I typically turned 8400-8800 depending on the prop I used. On several occasions I did get 9000 out of it.

No exhaust work is permitted on the block for SST60.

[scudder]

thank you for the info!