If you have good 93 octane fuel available consider yourself lucky. I’d bump the compression up with the 72cc heads, higher compression equals more power and better fuel efficiency.
The 87cc heads were produced for 455 builds with 10:1 compression in mind. Nowadays 10:1 compression is kind of on the low side of where most are running aluminum heads.
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1964 Tempest Coupe LS3/4L70E/3.42
1964 Le Mans Convertible 421 HO/TH350/3.08
2002 WS6 Convertible LS1/4L60E/3.23
1966 VW Type 2 Single Cab Pickup 140hp 2276
1956 VW Type 2 Panel Van 36hp 1200
1957 VW Type 1 Beetle 180hp 2276
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