Speedmaster Hydraulic Flat Tappet Top End Engine Kit Chevy Big Block 454
746-PCE435.1016
Product Q&A
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Big Block Chevy
Don't spend hours figuring out which pieces and parts you need to get what you want from your engine. Speedmaster has already done the work for you. Their Top-End engine kits will save you the time and hassle of mixing and matching components yourself. These kits are specifically designed to deliver the performance you want, at a better price than purchasing the parts separately.
Kits include:
- Fully assembled Procomp cylinder heads
- Intake manifold
- Valve covers
- Intake manifold gaskets
- Roller rockers
- Guideplates
- Screw in rocker studs
Specifications
- Max Lift: .550
- Coil Bind: .740
- Intake Install: 130lbs @ 1.8
- Exhaust Install: 130lbs @ 1.8
- Closed Seat Pressure: 110lbs
- Open Seat Pressure: 300lbs
Notes:
- Cylinder heads require the use of 14 mm x 3/4 in. reach 5/8 in. hex gasket seat spark plugs
- Some recommended plugs are: NGK BCPR6ES or R5671A-7, Champion RC12YC, Autolite AR3923 or AR3924
- These are for mild street engines, higher compression or boost applications require colder spark plugs
- These heads require +.100 in. longer head bolts / studs
- Use PCE279.1005 head stud Kit. ARP 135-3703 12pt. head bolts, or 235-4303 head studs work too
- These heads should be torqued to 65 ft.lbs. when using high pressure moly lube or 70 ft.lbs. when using 30wt. oil
Specifications:
Part Type
Product Line
Camshaft Included
No
Camshaft Style
Hydraulic flat tappet
Carburetor Flange
4150
Combustion Chamber Volume (cc)
119
Cylinder Head Bolts Included
No
Cylinder Head Material
Aluminum
Cylinder Head Style
Assembled
Exhaust Port Location
Raised
Exhaust Port Shape
Oval
Gaskets Included
Yes
Guideplate Pushrod Size
0.375 in (9.525 mm)
Guideplates Included
Yes
Intake Manifold Included
Yes
Intake Material
Aluminum
Intake Port Location
Standard
Intake Port Shape
Oval
Intake Runner Volume (cc)
320
Lifters Included
No
Lock Style
10 degree
Locks Included
Yes
Package Depth
15.00
Package Height
23.00
Package Width
22.00
Part Category
Performance Parts
Part Fitment
Semi Universal
Pushrods Included
No
Quantity
Sold as a kit
Rocker Arm Studs Included
Yes
Rocker Arms Included
Yes
Shipping Weight
40.00
Spark Plug Style
Angled
Valve Cover Finish
Polished
Valve Cover Material
Cast aluminum
Valve Covers Included
Yes
Vendor Part Number
PCE435.1016
Would I have to change my push rods
The Speedmaster 746-PCE435.1016 top end kit does not require special pushrods.
Date published: 2023-03-08
Will this kit work on a Gen V 454?
Yes, this kit should work on your GEN V big block Chevy engine.
Date published: 2022-12-18
What's the max lift these springs are rated for want to select a cam that will work with these heads or verify if I will need new springs
These should work for cams with up to .600" lift
Date published: 2024-02-25
I have a mark IV bbc will this kit work on my application ?
Yes, this will fit that engine.
Date published: 2018-01-30
What kinda hp will this kit make and the rpm range? What are the details to the intake ? Are they matching rectangular port?
These are matching rectanglular port heads and intake. Speedmaster does not list an HP rating on this kit.
Date published: 2018-01-26
What are the rocker arm ratio? And heads intake and exhaust values sizes?
This is 1.7 ratio with 2.25 and 1.88 valves.
Date published: 2018-01-25
What comes with this kit? theres no description in the details
This includes everything pictured. The heads, intake, rocker arms, valve covers and intake.
Date published: 2018-10-12
Will this product fit on my 1972 chevy c20 with a 402 BBC???
This should work on your engine.
Date published: 2019-10-04