The order was placed on Jan 26th., 2001.

http://www.airflowresearch.com/chev190.html

Options ordered with my heads are as follows:
 
 
AFR P/N Description Comment Est. Cost
1147

1226
7204
7219
8020
9005
6105
6410
6611
6325
9050
9060
9070
9080

190cc, L98 plug angle, 74cc open chamber, bare

Machine for Heat cross over
Street 2.020 - #10550
1.600 Street-rev #9000
Hydraulic 1.450 springs
10deg valve locks
Guideplates-AFR S.B.
3/8 rocker studs - stnd
Rubber valve seals
Shim .015 1.450 O.D.
AFR S.B. Bronze guides .502
AFR 2.200 Intake seats
AFR 1.695 Exhaust seats
Helicoils 7/16 14x1.2
 

I wanted 180cc intake runners, but the tech talked me out of it. The ZZ4 heads have 163cc ports so it will be a substantial low-end change. The plug angle should match what I have now.  $1275
1263 Drill for Centerbolt Valvecover package about the same costs as a decent set of new rocker covers and wirelooms  $  45
1230 Angle  mill to 58cc chamber, adj. intake angle
(flat-mill from 74cc to 68cc, angle-mill from 68cc to 58cc)
Size combustion chamber to that of the ZZ4 heads $ 250
1561 Temperature Sensor drill/tap Wasn't sure about this, can always plug it I guess? $  25
8504 Titanium Retainers (1.450" springs) Fairly inexpensive safety/performance option $ 120
6155 (6163, 6164, 6153) Hydra-Rev roller cam rev kit (OEM lifters)

Factory rev kit bars
Factory rev kit retainers
Rev kit springs

That OEM "spider" always did bother me..  $ 229
6305 ARP Head Stud kit Last thing I want to do is strip out the threads in the block. I suffer from IDKMOS syndrome (I Don't Know My Own Strength) and since I'll have the heads on/off a bit to check valve clearance, I thought this was a good option. $  150
6805 FelPro 1010 Head Gasket (0.039") The ZZ4 comes with 0.051" gaskets (p/n 12557236) so these should help the quench and raise compression to about 10.4:1 if I can keep the piston/valve clearance to over 0.100"  $  66

 
Head/Lift (CFM Flow Exh/Ink/% ) 0.050 0.100 0.150 0.200 0.300 0.400 0.500 0.550
ZZ4/L98 22.8 / 30.2 = 75.5% 47.3 / 58.2 = 81.3% 70.4 / 90.4 = 77.9% 94.0 / 116.4 = 80.8% 126.0 / 158.4 = 79.5% 145.0 / 185.0 = 78.8% 160.6 / 193.1 = 83.2% 162.2 / 193.1 = 84.0%
AFR 190 26.3 / 32.2 = 81.7% 57.0 / 65.8 = 86.6% 85.5 / 103.4 = 82.7% 116.9 / 137.6 = 84.9% 165.4 / 190.9 = 86.6% 190.8 / 230.9 = 82.3% 201.9 / 245.7 = 82.2% 203.5 / 245.7 = 82.3%
Change +3.5 / +2.0 = +6.2% +9.7 / +7.6 = +5.3% +15.1 / +13.0 = +4.8% +22.9 / +21.2 = +4.1% +39.4 / +32.5 = +7.1% +45.8 / +45.9 = +7.1% +41.3 / +52.6 = -1.0% +41.3 / +52.6 = -1.7%

 

The following are links to dated directories of pictures I'm taking during the swap. They will be better organized once I have more time.. (after the swap 8-)


Photos of AFR Heads as they arrived in the mail

Photos of ZZ4 Head removal

Photos of AFR Head install preliminaries

Photos of AFR Head prep-work

Photos of AFR Heads on Hydra-Rev kit

Photos Semi-Siamesed Edelbrock TPI Base

Photos Semi-Siamesed Edelbrock TPI Base porting

Photos Lashing, SFCs, leaks

Photos SFC Install

Photos GMHTP EFI-I 2001

Photos 1.5 stock rocker testing

Photos 1.6 RR replacement

Photos Semi-Siamesed Edelbrock TPI Base Install

Photos Exhaust Valve tips from Crane RRs

Photos Pro-Magnum 7/16" RR upgd and lifter swap

Photos AFR D-side removal and diag

Photos Final Diag, what'a year..