This is what I'll give you for $4000

914 2.0 heads, new SS 42X38mm valves and seats w/dual springs, keepers, retainers,
fully balanced 914 78mm Raby crank set. (pulley to PP)
type 1 CB rods, clearanced and balanced, raby
1.7 rockers, clearanced
911 adjusters and 8mm rocker studs
1.8 Case w/galley plugs & labour
bearings, german
gasket set,
seals, main and nose
Peter Weber Quiet Horsepower header, no muffler with new stubs.

right here we're easily past $4K

set of hydro rocker spacers.
26mm shadek pluged oil pump
Full flow cover, powdercoated
filter adaptor, new but with a broken bracket, I'll fix it so it's not seen
full flow modified engine mount
stock filter block-off.
A certain amount of free tech help. (more than most vendors, but I'm not building it for you)

There might be more I'll have to look, but mostly stock parts from here on.

what you will still need to buy (not included):

most prices from Aircooled.net (price with proper options)

pushrods, $70
96mm P&C's $600,
stroker cam $175,
lifters $180,
Mallory Unilight distributor $335,

Rimco machine, cylinder shims $80
Pelicanparts, tuna can (small sump) $67
full flow hose and fittings approx $100
Carbs
muffler

1-5/8 Peter Weber header, Chris himself told me it's the predecessor of his and that his stubs most likely fit. A quick google search you will find some kind of connection with CFR and Peter Weber, but "what and how" is not my biz.
dirty but not rusty...because it is ceramic coated.

How much is a tangarine header?

heads and 78mm crank