Hello Again!
To start I would like to say thank you to all patient CF users who always replied to my sometimes ridicules questions.

So bear with me again.

As I am trying to piece an engine together for my 1980 L48 Manual by a chance I have been presented with this engine option by a reputable United Kingdom engine builder and parts supplier http://www.realsteel.co.uk/ .

This engine is 1986 Two bolt main ONE PIECE REAR MARINE SBC 350 and was machined two months ago for a customer who at a last minute pulled out of the deal so the machine shop kept the block.

This blocked was machined and honed to +0.30” to fit Keith Black hypereutectic pistons # KB231030.
The block was decked as well, but the machine shop can not remember by how much as they done the work two months ago, however they said that it was decked by the very least amount.? and are sure that the block was never decked before!!

The deal on this block is this:

For £500.00 I will get the machined block, KB231030 pistons , re-machined one piece rear crankshaft and they will fit the pistons to the connecting rods of my choice free of charge.{ I was recommended the Eagle I beam BUSHED pistons for this application as they will work well with the KB pistons?}

Just to put this deal in to perspective a set of KB231030 retail for £231.00!!! so £500.00 for this lot seem a good deal to me.

I am very tempted to buy it, however what does it require to fit post 1986 block to 1980 car?
Should I buy it?

Thank you
Paul

P.S. This block was checked before any machining job was done. The block has been for sale for the past two months now and nobody wants to buy it so they just want to get rid off it.

 

I'm no expert on the differences, but since you have a 4 speed car, check to see that the block is machined for the clutch z-bar pivot ball. Also is it machined for a mechanical fuel pump. I'm sure others will chime in.

 

You will need the later flywheel

 

So I will need the 153 tooth flywheel.
Will I need a new clutch, clutch cover and starter motor?

 

Nope, just the new flywheel. The 1 piece seal engines have a flywheel with a counterweight unlike the earlier engines. Also, make sure that the block is drilled for the cluthc linkage and you should be good to go.

 

If the block is not drilled for clutch linkage is it possible to get it drilled?

 

Yes, if the boss is not drilled and tapped, it can be done. Ask the shop if the forward clutch pivot boss is tapped. There is one boss above the oil filter for most GM cars, the Corvette uses one that is about 4" forward of that.

 

Some later blocks are not machined for the fuel pump rod, so it may have to be done. Other than that and the newer flywheel or flexplate you should be ready. By the way, get later bolts too. Early flywheel or flexplate bolts are the same thread but the larger heads make them impossible to tighten.

 

I am going to see the block tomorrow and will take some pictures so we know what we are talking about.

Thank you
Paul