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Old 11-02-2012, 05:26 PM
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A 307 makes for a really good little motor to supercharge with a 142 weiand blower.
You can use open chamber 76cc heads on it to get the desired low compression ratio

EG 441. 920 chevy smog era castings w 1.94 x 1.50 valves, these like home porting too. (it is the same job as port 305 heads)
to alllow lots of blower boost on pump gas. These motors make impressive power when supercharged.
Use a cam with a wide LSA 112 114deg.
A eg: for a blower cam would be a Lunati 401A3LUN (solid) or a Crane H-278-2 (hyd)
You will slay your fair share of 383's with a 142 blown 307.

you want a blower friendly compression of 7.5 to 8.5:1 low cr allows lots of boost.

Again don;t be shy with the gears and converter.. these lil motors like to rev, when hotrodded. Just like a 283 or 302.

drill and roll pin the rocker studs on your heads.

Last edited by F-BIRD'88; 11-02-2012 at 05:37 PM.
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