ENGINE GUIDE
Cu. In.
Liters
Years
Bore
Stroke Main Dia.
Rod Dia.
Rod Length
Deck Ht.
Comp. Ht.
OLDSMOBILE Small Block 260
4.3
1975-82 3.500"
3.385"
2.499"
2.124"
6.000"
9.330"
1.576"
307
5.0
1980-90 3.800"
3.385"
2.499"
2.124"
6.000"
9.330"
1.596"
330
5.4
1964-67 3.938"
3.385"
2.499"
2.124"
6.000"
9.330"
1.615"
350
5.7
1968-80 4.057"
3.385"
2.499"
2.124"
6.000"
9.330"
1.615"
403
6.6
1977-79 4.351"
3.385"
2.499"
2.124"
6.000"
9.330"
1.615"
Big Block 400 (Early)
6.6
1965-67 4.000"
3.980"
3.000"
2.499"
6.996"
10.625"
1.615"
400 (Late)
6.6
1968-69 3.870"
4.250"
3.000"
2.499"
6.735"
10.625"
1.735"
425
7.0
1965-67 4.125"
3.980"
3.000"
2.499"
6.996"
10.625"
1.615"
455
7.5
1968-76 4.125"
4.250"
3.000"
2.499"
6.735"
10.625"
1.735"
PONTIAC 265
4.3
1980-81 3.750"
3.000"
3.000"
2.000"
6.625"
9.153"
1.570"
301
4.9
1977-81 4.000"
3.000"
3.000"
2.000"
6.625"
9.153"
1.570"
326
5.3
1963-67 3.719"
3.750"
3.000"
2.249"
6.625"
10.250"
1.711"
350
5.7
1968-77 3.875"
3.750"
3.000"
2.249"
6.625"
10.250"
1.700"
389
6.4
1959-66 4.063"
3.750"
3.000"
2.249"
6.625"
10.250
1.700"
400
6.6
1967-79 4.120"
3.750"
3.000"
2.249"
6.625"
10.250"
1.714"
421
6.9
1963-66 4.094"
4.000"
3.250"
2.249"
6.625"
10.250"
1.750"
428
7.0
1967-69 4.120"
4.000"
3.250"
2.249"
6.625"
10.250"
1.592"
455
7.5
1970-76 4.150"
4.210"
3.250"
2.249"
6.625"
10.250"
1.497"
COMPRESSION HEIGHT GUIDE
The following chart is designed to determine the required compression height when choosing cubic inch displacement, cyl- inder bore, stroke and rod length. Often, identical displacement engines may be assembled in several variations, depending upon the chosen rod length and compression height. For example; a Small Block Chevy 383 CID engine may be assembled in three different rod length/compression height variations using a 5.565" rod/1.561" comp. ht., 5.700" rod/1.433" comp. ht., or a 6.000" rod/1.130" comp. ht. Many more engine variations may be created other than what is listed, however, those listed are readily available using “off-the-shelf” pistons, connecting rods and crankshafts.
Cubic Inch
Rod Length
Deck Height
Compression Height
Bore
Stroke
Chevy Small Block 283 5.700"
3.875" 3.736" 3.736" 4.000" 4.000" 3.736" 3.736" 4.000" 4.000" 4.000" 4.125" 4.000" 4.125" 4.000" 4.000" 4.000"
3.000" 3.480" 3.480" 3.250" 3.250" 3.750" 3.750" 3.480" 3.480" 3.480" 3.250" 3.600" 3.480" 3.750" 3.750" 3.750"
9.025" 9.025" 9.025" 9.025" 9.025" 9.025" 9.025" 9.025" 9.025" 9.025" 9.025" 9.025" 9.025" 9.025" 9.025" 9.025"
1.805" 1.561" 1.261" 1.678" 1.385" 1.561" 1.433" 1.561" 1.265" 1.061" 1.380" 1.490" 1.261" 1.561" 1.433" 1.130"
305 305 327 327 334 334 350 350 350 353 366 377 383 383 383
5.700" 6.000" 5.700" 6.000" 5.565" 5.700" 5.700" 6.000" 6.200" 6.000" 5.700" 5.700" 5.565" 5.700" 6.000"
2018 ENGINE BUILDER CATALOG
541
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