Can I put cathedral-port heads on a 6.2 or rectangle-port heads on a 5.3?
Per Speedway Motors: LS1/LS6 engines use cathedral-port heads; LS2 (4.000 in bore) can use cathedral or LS3/L92 rectangle-port heads; 6.2 LS3-family engines can use any head except LS7 rectangle-port heads. Rectangle heads need a matching rectangle-port intake (Malex).
Confidence: medium — sources disagree or are limited; check the sources below.
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Sources
- Best LS Heads for 6.0/5.3/4.8 | Cathedral Port Heads vs Rectangular — Speedway Motors