H1K, if you do go down the route of the pusher pump, have a look at BjBlasters site
SVO - The Swirl Tank

He uses a shurflo pump that works perfectly for him

regards

Craig

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Toyota Surf SSRG 1993 3 Litre Turbo
Single tank conversion
blend of 70%WVO, 25% Kerosene, 5%ULP - varies by time of year