which cylinder heads for a 421
#1
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Join Date: Mar 2004
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which cylinder heads for a 421
wondering which cylinder heads i should use for my 421 i have a set of track 1 heads but the intake runners are small.for the cost of porting i could buy a set of heads that will flow
#2
If you want a quality 23˚ head call Chad. He can set you up with the castings and runners that will suit what you have best, and the best head if you want to maintain your current rocker hardware.
http://www.SpeierRacingHeads.com/
If you want something better such as 18˚ or 15˚ heads, SB2's, or some other higher end head give Curtis at Race Flow Development a call.
http://www.raceflowdevelopment.com/
http://www.SpeierRacingHeads.com/
If you want something better such as 18˚ or 15˚ heads, SB2's, or some other higher end head give Curtis at Race Flow Development a call.
http://www.raceflowdevelopment.com/
#3
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Re: which cylinder heads for a 421
Originally Posted by scott0408
wondering which cylinder heads i should use for my 421 i have a set of track 1 heads but the intake runners are small.for the cost of porting i could buy a set of heads that will flow
Eric Weingartner
#4
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Re: which cylinder heads for a 421
Originally Posted by scott0408
wondering which cylinder heads i should use for my 421 i have a set of track 1 heads but the intake runners are small.for the cost of porting i could buy a set of heads that will flow
#5
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Location: central Illinois
Posts: 459
Which
I built a friend a 13:1 421" SBC and used PRO TOPLINE/RHS 235 aluminum heads with no porting. .690" lift cam.
At 2850# it runs 5.90s in 1/8.
You almost need offset rockers on intake valves with these heads, but with adjustable guide plates you can manage no offset if you accept a slight off center on the valve stem. No problems in 2 seasons.
At 2850# it runs 5.90s in 1/8.
You almost need offset rockers on intake valves with these heads, but with adjustable guide plates you can manage no offset if you accept a slight off center on the valve stem. No problems in 2 seasons.
#6