Who knows the answers??

[Clem Z.]

Re: Who knows the answers??

Deck Piston Type
H.P.Disp. Cl Dish/Dome Ht/Vol Valves Cam Lift Springs Gasket Head Castings


90 153 .011 1725/1505 398/398 Outer w/Damp
95 164 .0005 1345/1245 385/385 Outer w/Damp
110 164 .0005 1345/1245 391/391 Outer w/Damp 3883863,3878566
120 194 .011 1725/1505 335/335 Outer Only 329609,3864883
140 230 .011 1725/1505 335/335 Outer Only 3864886,331184,331183,3998180
150 164 .0005 1345/1245 391/391 Outer w/Damp
155 230 .011 1725/1505 407/407 Outer w/Damp 3864886,331184,331183,3998180
195 283 .014 Flat 1725/1505 399/399 Outer w/Damp .018 520,896,842
220 283 .014 Flat 1725/1505 399/399 Outer w/Damp .018 520,896,842
250 327 .014 Flat 1725/1505 399/399 Outer w/Damp .018 896,520,842
300 327 .014 Flat 1945/1505 399/399 Outer w/Damp .018 461,462,041,492,186,291
340 409 .011 2070/1725 401/412 Outer/Inner 3830817
365 327 .002 Dome .122" 5.3cc 2023/1605 485/485 Outer w/Damp .018 461,462,186,414,041,492,291
375 327 .002 Dome .122" 5.3cc 2023/1605 485/485 Outer w/Damp .018 461,462,186,414,041,492,291
400 409 .011 2195/1725 556/556 Outer w/Damp 3852583
425 409 .011 2195/1725 556/556 Outer w/Damp 3852583

[Jerry W.]

Re: Who knows the answers??

Sorry for changing the OP but If the specs that you provided ( clem ) are valve grinding specs it looks like 340HP and 360HP are the same but different than 300HP which would be contrary to what Joe posted as 300 and 340HP valves being the same...see I said this wasn't easy :-)

[Clem Z.]

Re: Who knows the answers??

the first post was 1962 and the second post was 1964 and here is 1963. the valve size was different in different year for the SHP Deck Piston Type
H.P.Disp. Cl Dish/Dome Ht/Vol Valves Cam Lift Springs Gasket Head Castings


80 145 .010ab 1345/1245 314/344 Outer Only
84 145 .010ab 1345/1245 314/344 Outer Only
90 153 .011 1725/1505 397/397 Outer w/Damp
102 145 .011ab 1345/1245 378/378 Outer w/Damp
120 194 .011 1725/1505 335/335 Outer Only 329609,3864883
140 230 .011 1725/1505 335/335 Outer Only 3864886.331184,331183
3998180
150 145 .010ab 1345/1245 374/374 Outer w/Damp
195 283 .014 Flat 1725/1505 399/399 Outer w/Damp .018 520,896,842
250 327 .014 Flat 1725/1505 398/398 Outer w/Damp .018 896,520,842
300 327 .014 Flat 1945/1505 398/398 Outerw/Damp .018 461,462,041,492,291
340 327 .002 Dome .122" 5.3cc 1945/1505 393/399 Outerw/Damp .018 461,462,041,492,291
340 409 .011 2070/1725 400/412 Outer/Inner 3830817
360 327 .002 Dome .122" 5.3cc 1945/1505 393/399 Outer wDamp .018 461,462,041,492,291
400 409 .011 2195/1725 507/519 Outer w/Damp 3852583,3814690
425 409 .011 2195/1725 507/519 Outer w/Damp 3852583,3814690
430 427 .011 2195/1725 556/556 Outer w/Damp **
**Optional springs Outer & Inner

[Clem Z.]

Re: Who knows the answers??

looks like the 300HP 1.945/1.505 stayed the same in 1962,63 and 64 and in 1964 the solid lifter engines went to 2.026/1.605

[Clem Z.]

Re: Who knows the answers??

looks like the 300HP 1.945/1.505 stayed the same in 1962,63 and 64 and in 1964 the solid lifter engines went to 2.026/1.605

the reason the NHRA specs are .005 bigger than what in normally quoted is because the valve size could be checked hot and they could be expanded.

[Jerry W.]

Re: Who knows the answers??

Thank You very much....This was a Tech question and we didn't bash anyone :-)

[Clem Z.]

Re: Who knows the answers??

Thank You very much....This was a Tech question and we didn't bash anyone :-)

we are here to serve !!!

[Joe L.]

Re: Who knows the answers??

Thank You very much....This was a Tech question and we didn't bash anyone :-)

Jerry-----


As clem mentioned, the 2.02/1.60 valve size was first used for the 1964 model year. Those sizes were used for L-76 and L-84. For 1965-68, the L-79 also received the 2.02/1.60 valves. Later on the L-46, LT-1. and L-82 engines used the 2.02/1.60.

For 1962-63 all engines used the 1.94/1.50 valve size except the base 250 hp engine. That engine used 1.72/1.50 valve size.

[Mike E.]

Re: Who knows the answers??

Now an easy one...What was the first year a 8-track was offered as an RPO.

Mike

[Joe L.]

Re: Who knows the answers??

Now an easy one...What was the first year a 8-track was offered as an RPO.

Mike

Mike-----



1977. Just about the time that 8 tracks were passe and cassettes had about taken over the market, GM started installing 8 tracks.

[Mike E.]

Re: Who knows the answers??

Yep...And they changed the dash to accept standard GM radio. I think CB followed in 78...I had a 78 SA with a CB, never worked worth a damn the car got stolen in 1980 and was never recovered . When I joined NCRS a few months ago that made my membership number was easy to remember.

Mike