Another piston option for the 273.

Im still looking at options, being a machinist my options are varied outside of the box so to speak.
The heads have the early angled manifold bolts. I believe later 273 heads are the same as all the rest of the LA mills. I will point out for those reading.
I have an Edlebrock performer manifold with the use of a 1" spacer the result is a performer RPM.
Now Edlebrock have given a real thick 5/8" thick flange on its inlet ports. Also the holes could be as large as 1/2", the bolts for the manifold are smaller. So the bolts can still be screwed in.
The solution is either make up some angled washers or have the manifold bolt holes spot faced to suit the early bolt angles. For the valves i was going with the 1.88 in, and 1.6 ex. Once the block is bored and i get a better feel for clearances, if i must i will reduce the outside diameter of the valves to get my 80th clearance from the cylinder wall. I like the voodoo Lunati range of cams not going too big as its still a small motor the 1500-5500 solid street strip unit looks good. Have a look at Nicks garage on youtube. I will be porting the original heads. I measured the combustion chamber and was surprised it was at 68cc. The piston at present sits about 60th below the deck. With the race pistons the catalogue says 12:1 but thats in the GM block the raised head pistons are a bit taller than the mopar originals. With deck machining and facing the heads i will be aiming for 10 to 10.5:1.
I may go with roller tip rockers but the originals should be ok. The Scat cranks usually need weight added but im hopeing the 30% lighter racing pistons might help..
Im considering a 5 or 6 speed gearbox so final ratio around the 3's '3.55' should be fine. First gear being pretty low but 5 and 6 are overdrives.

I recently fitted a SC14 super charger on my slant 6 blowing thru a FITECH injection system running 7lb boost water injection with bypass valve mainly for pressure control but to help on idle also i have retained the Toyota electric clutch so when the throttle is right back at its rest the SC stops pumping. The car has a celica 5 speed ive run down and passed some impressive V8's with this old girl. That car has its original diff of 2.78. Actually the silver car is in my gallery but its not finished when they were shot.