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Regarding NON-synthetic Rotella T: I've never seen NON-synthetic Rotella T 10W-30 ... but ... do typicially see NON-synthetic Rotella T in either multigrade 15W-40 or singlegrade 30W. ZDDP evidence? ... You have to look it up or accept word of those who have. You want proof? ... send your...

Quite likely you don't need a "performance" oil pan gasket. FP also has 'replacement type' 1-pc rubber oil pan gasket. Felpro p/n OS34510T is correct for 75 thru 85 sbc ... and it's a ONE-piece rubber gasket that also includes full set of new bolts & washers and the little plastic starter...

I guess "true duals" has more than one meaning??? To me ... it differentiates between a system having (A) a single exhaust pipe run from V8 to either 1 or 2 mufflers and 2 tailpipes/tips OR (B) like a pre-cat C3 system having 2 exhaust pipes run to 2 mufflers & 2 tailpipes/tips. To me ... true...

Whatever the max lift at spring is you MUST have an additional approx 0.060" to 0.075" it can compress to avoid coil bind. Does the .575 mean it can compress 575 and then 060 more until it becomes solid? or ... or does it mean .515 + .060 = .575??? Does it mean 1.800 spring is solid at 1.225" ...

Your numbers look fine; their range/variance is also quite acceptable. We rejoice in your discovery.

Realistically, what is your overall budget for this motor job? Glad you found a machine shop so close. For what you're doing, you don't require a performance ms ... what's most important is using a good ms ... the 2 aren't always 1 in same ... check close ... drive a little further if need be...

Mitch you have a PM ... just email me

I'm all but in Florence. If you were to pull your 78 motor out & put it on an engine dyno ... assuming it's it pretty good shape & in pretty good tune ... it'll probably make about 250 hp. Compare that to hp figures you see publicized for GM crate motors. Yes, true duals & no cat will help a lot...

Me thinks 383 partial engine ( GMPP p/n 12499106 ) will be a better match w/ 195cc runners. Your old flexplate that fits a '75 motor won't fit new 383 or even zz4-350 ... newer motors have a different bolt pattern. It will work (non-roller cam fit in roller block), but I echo what Bill says...

L48 has dished pistons ... L98 aka ZZ4 heads work real well with them with their 58cc chambers ... yes they have rather small runners about 163cc but that's fine for your 268 cam. Also, L98 heads fit your intake. L98/ZZ4 aluminum heads are very good quality ... they are GM p/n 12556463. With...

Yes ... they're popular in circle track racing. I have one for sale if you want ... 30 over 400 block ... steel 350 crank ... 6" manley I beam rods ... manley platinum forged domed pistons. The 377 (destroked 400) is usually INTERNAL balanced. On the other hand, a 377 (stroked 350) using stock...

Pa Goose: I like a street 383 ... lotsa bang for the $. Suggest you scrounge up a good used bare 350 block w/ bores that'll clean up at 0.030" over ... build it up as 383 ... most '86-up 350 blocks either have OE Roller Cam or are ready to fit OE RC ... lots more cheaper piston choices for 383...

Do some closer checking first ... if carpet etc is wet for ANY reason it'll haze the glass overnite ... ie leaking ttop/door gaskets will collect some water under carpet/seats ... some vaporizes in daytime... some condenses on cooled glass at nite ... hazed glass.

Typical OE L48 cast iron Qjet intake (ie c/n 3973460 for lowhood base '71 L48) tallest pad height is at rear = Rpad = 4.375" ------------------------------------------------------------------ For comparison ... these two aftermarket Alum intakes fit any C3 hood, Qjet and regular heads Intake...

Send Qjet out to Lars Grimsrud for rebuild that's tuned for YOUR car. He's a CAC member & has a great reputation. You'll end up with a carb as good or better than new... for a bit less $ than new.

Last time I checked ... at least a year ago ... Edelbrock had discontinued offering Qjet clones (edelbrock's 19XX series) ... but still offered parts.

If you have iron manifolds ... and if you have the lower Vchannels ... and if not chasing originality ... suggest pulling off & storing Vchannels ... suggest running wires down back of block & under manifolds to 90* plug boots ... more or less like OE.

In addition to above-mentioned info resources ... NCM has a handy little freeware program ... it even has a spreadsheet to track all that $ you'll spend on your favorite painted lady: http://www.corvettemuseum.com/library-archives/vetteset/index.shtml

Shared & jousted through a few emails & posts over the years ... never met ... but his mind's breadth & depth will be missed. May God bless you & yours Ken.

Ralph: I saw this thread just today. Did you order the carb from Lars in CO? Lars has a great rep w/qjets & tach drive distributors ... Lars' email: V8fastcars(AT)msn(DOT)com