Chevy Big Block
Forced Induction - Dish Top

• Designed for open or closed chamber cylinder heads.
• Forced induction applications. 2618 alloy.
• Increased crown thickness = .260”.
• Ratios figured for .020” deck@9.800” & 10.200”.
• Standard 1/16” x 1/16” x 3/16” ring package.
• Premium 8620 wrist pins included.
• Gasket volume = 9.7 to 10.9cc’s.
• Top ring down = .340”.
• Designed for 2.300” diameter intake valves and 1.880” exhaust valve.
• Valve relief depth = .310” intake.
• Some items are non-stock parts, made to order as necessary. See the shopping cart for availability.

Big Block Chevy : 9.800" Deck Height
Part #	Bore	Stroke	Rod	C. D.	Wt	Pin	CC's	Comp Ratio			Purchase Online
								112cc	118cc	124cc
								8.3 8.4 8.5 8.4	8.0 8.1 8.2 8.1	7.8 7.9 7.9 7.8
12405 $730	4.500 4.530 4.560 4.600	4.000	6.135	1.645	657 678 686 704	.990	-12.0				Discounted Prices
12412 $730	4.310 4.320 4.350	4.250	6.135	1.520	608 615 625	.990	-8.5	8.4 8.5 8.6	8.1 8.1 8.2	7.8 7.9 8.0	Discounted Prices
12415 $730	4.500 4.530 4.560 4.600	4.250	6.135	1.520	645 654 664 672	.990	-21.0	8.3 8.4 8.5 8.6	8.0 8.1 8.2 8.4	7.8 7.9 8.0 8.1	Discounted Prices
12425* $759	4.500 4.530 4.560 4.600	4.000	6.385	1.395	626 643 645 662	.990	-12.0	8.3 8.4 8.5 8.7	8.0 8.1 8.2 8.4	7.8 7.9 7.9 8.1	Discounted Prices
12431* $759	4.280 4.310 4.320 4.350	4.250	6.385	1.270	545 561 572 585	.990	-8.5	8.3 8.4 8.5 8.6	8.0 8.1 8.1 8.2	7.7 7.8 7.9 8.0	Discounted Prices
12435* $759	4.500 4.530 4.560 4.600	4.250	6.385	1.270	592 610 617 633	.990	-21.0	8.3 8.4 8.5 8.4	8.0 8.1 8.2 8.1	7.8 7.9 8.0 7.9	Discounted Prices

Big Block Chevy : 10.200" Deck Height
Part #	Bore	Stroke	Rod	C. D.	Wt	Pin	CC's	Comp Ratio			Purchase Online
								112cc	118cc	124cc
								8.5 8.6 8.7	8.2 8.3 8.4	8.0 8.0 8.1
12442* $759	4.310 4.320 4.350	4.500	6.535	1.395	595 602 621	.990	-14.5				Discounted Prices
12445 $759	4.500 4.530 4.560 4.600	4.500	6.535	1.395	628 645 647 661	.990	-30.0	8.3 8.4 8.5 8.4	8.1 8.1 8.2 8.1	7.8 7.9 8.0 7.9	Discounted Prices

* Includes Oil ring support rails.