Ford Small Block
Boss 302 / 351C- Flat Top

• Fits all factory heads, Motorsport A-4 & Blue Thunder 3.6, & CHI heads.
• Will work with small nitrous kits. 2618 alloy.
• Ratios figured for .010” deck@ 8.200” & 9.200”.
• Standard 1/16” x 1/16” x 3/16” ring package.
• Premium 8620 wrist pins included.
• Gasket volume = 9.0cc’s.
• Designed for 2.190” diameter intake valves & 1.710” exhaust valves.
• Valve relief depth = .200” -.210” intake and .000” exhaust.
• Some items are non-stock parts, made to order as necessary. Check the shopping cart for availability.

302 Block - 8.200" Deck Height
Part #	Bore	Stroke	Rod	C. D.	Wt	Pin	CC's	Comp Ratio			Purchase Online
								60cc	63cc	76cc
								9.2 9.2 9.3 9.3	8.9 8.9 8.9 9.0	7.8 7.8 7.8 7.9
31600 $660	4.030 4.035 4.040 4.060	3.000	5.090	1.600	-	.912	-3.5				Discounted Prices
31610 $660	4.030 4.035 4.040 4.060	3.000	5.155	1.535	515 - - -	.912	-3.5	9.2 9.2 9.3 9.3	8.9 8.9 8.9 9.0	7.8 7.8 7.8 7.9	Discounted Prices
31620* $689	4.030 4.035 4.040 4.060	3.250	5.400	1.175	-	.927	-3.5	9.9 9.9 9.9 10.0	9.6 9.6 9.6 9.7	8.4 8.4 8.4 8.5	Discounted Prices
31630* $689	4.030 4.035 4.040 4.060	3.400	5.400	1.100	-	.927	-3.1	10.3 10.3 10.4 10.4	10.0 10.0 10.0 10.1	8.7 8.7 8.7 8.8	Discounted Prices

 

351 Cleveland Block : 9.200" Deck Height
Part #	Bore	Stroke	Rod	C. D.	Wt	Pin	CC's	Comp Ratio			Purchase Online
								60cc	63cc	76cc
								10.6 10.6 10.6 10.7	10.2 10.2 10.3 10.4	8.9 8.9 9.0 9.0
31640 $660	4.030 4.035 4.040 4.060	3.500	5.780	1.660	-	.912	-3.5				Discounted Prices
31650 $689	4.030 4.035 4.040 4.060	3.850	5.956	1.310	- 475 - -	.912	-3.5	11.6 11.6 11.6 11.7	11.2 11.2 11.2 11.3	9.7 9.8 9.8 9.9	Discounted Prices
31660* $689	4.030 4.035 4.040 4.060	3.850	6.000	1.265	-	.927	-3.5	11.5 11.6 11.6 11.7	11.1 11.2 11.2 11.3	9.7 9.7 9.8 9.8	Discounted Prices
31670* $689	4.030 4.035 4.040 4.060	4.000	6.000	1.190	-	.927	-3.5	12.0 12.0 12.0 12.1	11.5 11.6 11.6 11.7	10.1 10.1 10.1 10.2	Discounted Prices