[HWYSTR455]

Add about 1800-2400, depending on what you get each block for. Maybe less. I got a deal on my, block machine work was free if I bought an IA2 block. It was a deal Butler had. They had a ready to assemble deal too that included a rotating assembly, but didn't go for that.

They have a $7200 short block IS2 based kit:

https://butlerperformance.com/i-2448...tegory:1234783

The 400 block based ones are $3900:

https://butlerperformance.com/i-2445...tegory:1234783

BUT, if you want 'select castings', and forged internals, and 4 bolt caps, it jumps up to like $5800. The IA2 short block offering is only with forged assemblies, so it makes it a more reasonable comparison. So $1300 difference.

Select castings are about $800 more, but if you want a select casting 400, with originally 2 bolt mains, it's more like $1100 more.

300+ CFM round port E-heads are $2995, which you would/could use on either.

Those are long blocks, you still need like cam, lifters, rockers, pushrods, valley & oil pans, intake, valve covers, balancer, oil pump, flexplate, etc. Obviously. But it's a true performance build at that point.

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