THERMO-Basic Thermo gasket from Auto Parts store has always worked fine for me, get the self adhesive one side though.
HEAD-Fel Pro (not sure of part number for stock heads) Gra[hite FMS or ROLS are also nice.
INTAKE-Fel Pro 1250, don't use the cor end seals always use a nice thick bead of RTV.
WATER PUMP- Stewart Componets, Hi-Flow un polished $69.00 polished $89.00
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Check Out My Site 91GT,Holley SysteMAX II Kit-Heads 2.02" x 1.60" port matched to a 1262,Anderson N-61,24#,76mm C&L,Full MAC exhaust 1-5/8" Long tubes,2-1/2" O.R H-Pipe,2 1/2" cat back, No A/C or PS or emissions, 12" K&N Filter,RNH PERFORMANCE Ram Air,Ron Davis Radiator,Full Suspension,S&W 8pt "X" brace,JAZ seats,3:73's,Welds..etc,4:30's and 31 splines coming very soon!